{"id":275550,"date":"2019-09-25T17:17:03","date_gmt":"2019-09-25T10:17:03","guid":{"rendered":"https:\/\/quipperhome.wpcomstaging.com\/?p=275550"},"modified":"2023-02-07T15:12:59","modified_gmt":"2023-02-07T08:12:59","slug":"karakteristik-gelombang-fisika-kelas-11","status":"publish","type":"post","link":"https:\/\/quipperhome.wpcomstaging.com\/mapel\/fisika\/karakteristik-gelombang-fisika-kelas-11\/","title":{"rendered":"Karakteristik Gelombang &#8211; Fisika Kelas 11"},"content":{"rendered":"<p><img fetchpriority=\"high\" decoding=\"async\" class=\"alignnone size-full wp-image-275530\" src=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2019\/09\/Gelombang-Berjalan-dan-Stasioner-Fisika-Kelas-11-c.png\" alt=\"\" width=\"800\" height=\"533\" srcset=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2019\/09\/Gelombang-Berjalan-dan-Stasioner-Fisika-Kelas-11-c.png 800w, https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2019\/09\/Gelombang-Berjalan-dan-Stasioner-Fisika-Kelas-11-c-768x512.png 768w, https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2019\/09\/Gelombang-Berjalan-dan-Stasioner-Fisika-Kelas-11-c-585x390.png?crop=1 585w, https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2019\/09\/Gelombang-Berjalan-dan-Stasioner-Fisika-Kelas-11-c-263x175.png?crop=1 263w, https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2019\/09\/Gelombang-Berjalan-dan-Stasioner-Fisika-Kelas-11-c-300x200.png 300w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/p>\n<p><span style=\"font-weight: 400;\">Hai Quipperian, bagaimana kabarnya? Semoga selalu sehat dan tetap semangat ya!<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Coba tebak, bagaimana cara astronot berkomunikasi di luar angkasa? Apakah mereka bisa bercakap-cakap layaknya orang yang ada di Bumi? Jika mereka bercakap-cakap seperti saat di Bumi, tentu suara mereka tidak akan terdengar satu sama lain. Hal itu karena di luar angkasa merupakan ruang hampa udara. Oleh karena itu, para astronot bisa berkomunikasi menggunakan gelombang radio.&nbsp;<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Mengapa gelombang bunyi tidak bisa merambat di luar angkasa, sementara gelombang radio bisa merambat di luar angkasa? Gelombang bunyi termasuk dalam gelombang mekanik, yaitu gelombang yang membutuhkan medium untuk merambat.&nbsp;<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Sebaliknya, gelombang radio merupakan gelombang elektromagnetik yang tidak membutuhkan medium untuk merambat. Keadaan tersebut menunjukkan bahwa gelombang itu bermacam-macam jenis dan karakteristiknya. Ingin tahu selengkapnya tentang macam-macam gelombang beserta karakteristiknya? Simak ulasan berikut.<\/span><\/p>\n<h2><strong>Pengertian Gelombang<\/strong><\/h2>\n<p><img decoding=\"async\" class=\"alignnone size-full wp-image-275553\" src=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2019\/09\/Karakteristik-Gelombang-Fisika-Kelas-11-1.png\" alt=\"\" width=\"800\" height=\"533\" srcset=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2019\/09\/Karakteristik-Gelombang-Fisika-Kelas-11-1.png 800w, https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2019\/09\/Karakteristik-Gelombang-Fisika-Kelas-11-1-300x200.png 300w, https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2019\/09\/Karakteristik-Gelombang-Fisika-Kelas-11-1-768x512.png 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/p>\n<p><span style=\"font-weight: 400;\">Gelombang adalah getaran yang merambat. Gejala gelombang bisa diamati dengan mudah, contohnya gelombang air laut akibat hembusan angin. Selama merambat, gelombang akan memindahkan energi tertentu dari satu tempat ke tempat lainnya. Namun demikian, medium perambatan gelombang tidak ikut pindah.<\/span><\/p>\n<h2><strong>Macam-macam Gelombang<\/strong><\/h2>\n<p><img decoding=\"async\" class=\"alignnone size-full wp-image-275532\" src=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2019\/09\/Gelombang-Berjalan-dan-Stasioner-Fisika-Kelas-11-a.png\" alt=\"Gelombang Berjalan dan Stasioner - Fisika Kelas 11\" width=\"800\" height=\"533\" srcset=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2019\/09\/Gelombang-Berjalan-dan-Stasioner-Fisika-Kelas-11-a.png 800w, https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2019\/09\/Gelombang-Berjalan-dan-Stasioner-Fisika-Kelas-11-a-768x512.png 768w, https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2019\/09\/Gelombang-Berjalan-dan-Stasioner-Fisika-Kelas-11-a-585x390.png?crop=1 585w, https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2019\/09\/Gelombang-Berjalan-dan-Stasioner-Fisika-Kelas-11-a-263x175.png?crop=1 263w, https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2019\/09\/Gelombang-Berjalan-dan-Stasioner-Fisika-Kelas-11-a-300x200.png 300w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/p>\n<h3><strong>A. Berdasarkan Medium Rambatannya<\/strong><\/h3>\n<p><span style=\"font-weight: 400;\">Berdasarkan medium perambatannya, gelombang dibagi menjadi dua, yaitu sebagai berikut.<\/span><\/p>\n<p><strong>1. Gelombang mekanik<\/strong><\/p>\n<p><span style=\"font-weight: 400;\">Gelombang mekanik adalah gelombang yang membutuhkan medium untuk merambat. Artinya, jika tidak ada medium, gelombang tidak akan pernah terjadi. Hal ini bisa Quipperian lihat pada kasus percakapan astronot di luar angkasa.Gelombang yang termasuk gelombang mekanik ini adalah gelombang bunyi, gelombang tali, dan&nbsp; gelombang air laut.&nbsp;<\/span><\/p>\n<p><strong>2. Gelombang elektromagnetik<\/strong><\/p>\n<p><span style=\"font-weight: 400;\">Gelombang elektromagnetik adalah gelombang yang tidak membutuhkan medium untuk merambat. Artinya, gelombang ini bisa merambat dalam ruang hampa sekalipun. Contoh gelombang elektromagnetik adalah cahaya, gelombang radio, sinar-X, sinar gamma, inframerah, dan sinar ultraviolet.<\/span><\/p>\n<h3><strong>B. Berdasarkan Arah Getar dan Arah Rambatnya<\/strong><\/h3>\n<p><span style=\"font-weight: 400;\">Berdasarkan arah getar dan arah rambatannya, gelombang dibagi menjadi dua, yaitu sebagai berikut.<\/span><\/p>\n<p><strong>1. Gelombang transversal<\/strong><\/p>\n<p><span style=\"font-weight: 400;\">Gelombang transversal adalah gelombang yang arah getarnya tegak lurus dengan arah rambatannya. Contoh gelombang transversal adalah gelombang tali, cahaya, seismik sekunder, dan sebagainya. Berikut ini merupakan contoh gelombang transversal pada tali.<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-275575\" src=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2019\/09\/Karakteristik-Gelombang-Fisika-Kelas-11-a.png\" alt=\"\" width=\"415\" height=\"211\" srcset=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2019\/09\/Karakteristik-Gelombang-Fisika-Kelas-11-a.png 415w, https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2019\/09\/Karakteristik-Gelombang-Fisika-Kelas-11-a-300x153.png 300w\" sizes=\"(max-width: 415px) 100vw, 415px\" \/><\/p>\n<p><strong>2. Gelombang longitudinal<\/strong><\/p>\n<p><span style=\"font-weight: 400;\">Gelombang longitudinal adalah gelombang yang arah getarnya sejajar dengan arah rambatannya. Ciri gelombang ini adalah memiliki rapatan dan renggangan. Contoh gelombang longitudinal adalah gelombang bunyi, pegas, dan seismik primer. Berikut ini contoh gelombang longitudinal pada pegas.<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-275574\" src=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2019\/09\/Karakteristik-Gelombang-Fisika-Kelas-11-b.png\" alt=\"\" width=\"440\" height=\"233\" srcset=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2019\/09\/Karakteristik-Gelombang-Fisika-Kelas-11-b.png 440w, https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2019\/09\/Karakteristik-Gelombang-Fisika-Kelas-11-b-300x159.png 300w\" sizes=\"(max-width: 440px) 100vw, 440px\" \/><\/p>\n<h3><strong>C. Berdasarkan Amplitudonya<\/strong><\/h3>\n<p><span style=\"font-weight: 400;\">Berdasarkan amplitudonya, gelombang dibagi menjadi dua, yaitu gelombang berjalan dan stasioner.<\/span><\/p>\n<p><strong>1. Gelombang berjalan<\/strong><\/p>\n<p><span style=\"font-weight: 400;\">Gelombang berjalan adalah gelombang yang memiliki amplitudo tetap. Artinya, setiap titik yang dilalui gelombang amplitudonya selalu sama besar. Contoh gelombang berjalan adalah gelombang air.<\/span><\/p>\n<p><strong>2. Gelombang stasioner<\/strong><\/p>\n<p><span style=\"font-weight: 400;\">Gelombang stasioner adalah perpaduan antara gelombang datang dan gelombang pantul yang amplitudo dan frekuensinya sama tetapi arah rambatnya berlawanan. Titik yang bergetar dengan amplitudo maksimum disebut perut, sedangkan titik yang bergetar dengan amplitudo minimum disebut simpul.<\/span><\/p>\n<h2><strong>Besaran-besaran dalam Gelombang<\/strong><\/h2>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-275118\" src=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2019\/09\/Limit-Fungsi-Aljabar-Matematika-Kelas-11-d.png\" alt=\"\" width=\"800\" height=\"533\" srcset=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2019\/09\/Limit-Fungsi-Aljabar-Matematika-Kelas-11-d.png 800w, https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2019\/09\/Limit-Fungsi-Aljabar-Matematika-Kelas-11-d-300x200.png 300w, https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2019\/09\/Limit-Fungsi-Aljabar-Matematika-Kelas-11-d-768x512.png 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/p>\n<p><span style=\"font-weight: 400;\">Jika Quipperian membahas tentang gelombang, pasti ada besaran-besaran utama yang harus dipahami. Adapun besaran-besaran yang dimaksud adalah sebagai berikut.<\/span><\/p>\n<p><strong>1. Amplitudo (<em>A<\/em>)<\/strong><\/p>\n<p><span style=\"font-weight: 400;\">Amplitudo adalah simpangan maksimum gelombang yang memiliki satuan meter (m).<\/span><\/p>\n<p><strong>2. Panjang gelombang (\u03bb)&nbsp;<\/strong><\/p>\n<ul>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Jika ditinjau dari gelombang transversal, panjang gelombang adalah jarak antara dua puncak yang berdekatan atau jarak antara dua lembah yang berdekatan.<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Jika ditinjau dari gelombang longitudinal, panjang gelombang adalah jarak antara dua rapatan atau dua regangan yang saling berdekatan.<\/span><\/li>\n<\/ul>\n<p><strong>3. Frekuensi gelombang (<em>f<\/em>)<\/strong><\/p>\n<p><span style=\"font-weight: 400;\">Frekuensi adalah banyaknya gelombang yang bisa terbentuk setiap detik. Secara matematis, frekuensi dirumuskan sebagai berikut.<\/span><\/p>\n<p><span style=\"font-weight: 400;\"> <img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-275573\" src=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2019\/09\/Karakteristik-Gelombang-Fisika-Kelas-11-c.png\" alt=\"\" width=\"89\" height=\"80\"><\/span><\/p>\n<p><span style=\"font-weight: 400;\">Keterangan:<\/span><\/p>\n<p><em><span style=\"font-weight: 400;\">f<\/span><\/em><span style=\"font-weight: 400;\"> = frekuensi gelombang (Hz);<\/span><\/p>\n<p><em><span style=\"font-weight: 400;\">n<\/span><\/em><span style=\"font-weight: 400;\"> = jumlah gelombang yang terbentuk; dan<\/span><\/p>\n<p><em><span style=\"font-weight: 400;\">t<\/span><\/em><span style=\"font-weight: 400;\"> = waktu tempuh gelombang (s).<\/span><\/p>\n<p><strong>4. Periode gelombang (<em>T<\/em>)<\/strong><\/p>\n<p><span style=\"font-weight: 400;\">Periode adalah waktu yang dibutuhkan gelombang untuk menempuh satu panjang gelombangnya. Periode juga bisa didefinisikan sebagai waktu yang dibutuhkan gelombang untuk melakukan satu kali putaran. Secara matematis, periode dirumuskan sebagai berikut.<\/span><\/p>\n<p><span style=\"font-weight: 400;\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-275572\" src=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2019\/09\/Karakteristik-Gelombang-Fisika-Kelas-11-d.png\" alt=\"\" width=\"138\" height=\"72\">&nbsp;<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Keterangan:<\/span><\/p>\n<p><em><span style=\"font-weight: 400;\">f<\/span><\/em><span style=\"font-weight: 400;\"> = frekuensi gelombang (Hz);<\/span><\/p>\n<p><em><span style=\"font-weight: 400;\">T<\/span><\/em><span style=\"font-weight: 400;\"> = periode (s);<\/span><\/p>\n<p><em><span style=\"font-weight: 400;\">n<\/span><\/em><span style=\"font-weight: 400;\"> = jumlah gelombang yang terbentuk; dan<\/span><\/p>\n<p><em><span style=\"font-weight: 400;\">t<\/span><\/em><span style=\"font-weight: 400;\"> = waktu tempuh gelombang (s).<\/span><\/p>\n<p><strong>5. Cepat rambat gelombang<\/strong><\/p>\n<p><span style=\"font-weight: 400;\">Cepat rambat adalah panjangnya jarak yang ditempuh oleh gelombang tiap satuan waktu. Secara matematis, cepat rambat gelombang dirumuskan sebagai berikut.<\/span><\/p>\n<p><span style=\"font-weight: 400;\"> <img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-275571\" src=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2019\/09\/Karakteristik-Gelombang-Fisika-Kelas-11-e.png\" alt=\"\" width=\"140\" height=\"72\"><\/span><\/p>\n<p><span style=\"font-weight: 400;\">Keterangan:<\/span><\/p>\n<p><em><span style=\"font-weight: 400;\">f<\/span><\/em><span style=\"font-weight: 400;\"> = frekuensi gelombang (Hz);<\/span><\/p>\n<p><em><span style=\"font-weight: 400;\">T<\/span><\/em><span style=\"font-weight: 400;\"> = periode (s);<\/span><\/p>\n<p><em><span style=\"font-weight: 400;\">v<\/span><\/em><span style=\"font-weight: 400;\"> = cepat rambat gelombang (m\/s); m<\/span><\/p>\n<p><span style=\"font-weight: 400;\"> \u03bb = panjang gelombang (m).<\/span><\/p>\n<h2><strong>Sifat-sifat Gelombang<\/strong><\/h2>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-275552\" src=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2019\/09\/Karakteristik-Gelombang-Fisika-Kelas-11-2.png\" alt=\"\" width=\"800\" height=\"533\" srcset=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2019\/09\/Karakteristik-Gelombang-Fisika-Kelas-11-2.png 800w, https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2019\/09\/Karakteristik-Gelombang-Fisika-Kelas-11-2-300x200.png 300w, https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2019\/09\/Karakteristik-Gelombang-Fisika-Kelas-11-2-768x512.png 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/p>\n<p><span style=\"font-weight: 400;\">Sifat-sifat gelombang adalah karakteristik atau ciri yang melekat pada gelombang. Quipperian tidak akan menemukan sifat tersebut pada objek selain gelombang. Memangnya, apa saja sih sifat-sifat gelombang itu?<\/span><\/p>\n<p><strong>1. Pembiasan (refraksi)<\/strong><\/p>\n<p><span style=\"font-weight: 400;\">Pembiasan merupakan peristiwa pembelokan arah lintasan gelombang karena melalui dua medium yang berbeda. Jika medium yang dilalui berbeda, maka indeks bias medium juga berbeda. Perbedaan indeks biasa inilah yang menyebabkan cepat rambat cahaya berbeda, sehingga seolah-olah ada pembelokan arah lintasan cahaya. Secara matematis, pembiasan dirumuskan sebagai berikut.<\/span><\/p>\n<p><span style=\"font-weight: 400;\"> <img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-275570\" src=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2019\/09\/Karakteristik-Gelombang-Fisika-Kelas-11-f.png\" alt=\"\" width=\"79\" height=\"74\"><\/span><\/p>\n<p><span style=\"font-weight: 400;\">Keterangan:<\/span><\/p>\n<p><em><span style=\"font-weight: 400;\">n<\/span><\/em><span style=\"font-weight: 400;\"> = indeks biasa;<\/span><\/p>\n<p><em><span style=\"font-weight: 400;\">c <\/span><\/em><span style=\"font-weight: 400;\">= cepat rambat cahaya di ruang hampa (m\/s); dan<\/span><\/p>\n<p><em><span style=\"font-weight: 400;\">v <\/span><\/em><span style=\"font-weight: 400;\">= cepat rambat cahaya di dalam medium tertentu (m\/s).<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Gejala pembiasan ini pertama kali diteliti oleh Snellius. Dengan demikian, hukum yang berlaku pada peristiwa pembiasan selalu mengikuti hukum Snellius. Untuk lebih jelasnya, simak gambar berikut.<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-275569\" src=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2019\/09\/Karakteristik-Gelombang-Fisika-Kelas-11-g.png\" alt=\"\" width=\"380\" height=\"242\" srcset=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2019\/09\/Karakteristik-Gelombang-Fisika-Kelas-11-g.png 380w, https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2019\/09\/Karakteristik-Gelombang-Fisika-Kelas-11-g-300x191.png 300w\" sizes=\"(max-width: 380px) 100vw, 380px\" \/><\/p>\n<p><span style=\"font-weight: 400;\">Secara matematis, Snellius bisa dirumuskan sebagai berikut.<\/span><\/p>\n<p><span style=\"font-weight: 400;\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-275568\" src=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2019\/09\/Karakteristik-Gelombang-Fisika-Kelas-11-h.png\" alt=\"\" width=\"164\" height=\"76\">&nbsp;<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Keterangan:<\/span><\/p>\n<p><em><span style=\"font-weight: 400;\">i <\/span><\/em><span style=\"font-weight: 400;\">= sudut datang;<\/span><\/p>\n<p><em><span style=\"font-weight: 400;\">r<\/span><\/em><span style=\"font-weight: 400;\"> = sudut bias;<\/span><\/p>\n<p><em><span style=\"font-weight: 400;\">n<\/span><\/em><sub><em><span style=\"font-weight: 400;\">1<\/span><\/em><\/sub><span style=\"font-weight: 400;\"> = indeks bias medium pertama;<\/span><\/p>\n<p><em><span style=\"font-weight: 400;\">n<\/span><\/em><sub><em><span style=\"font-weight: 400;\">2<\/span><\/em><\/sub><span style=\"font-weight: 400;\"> = indeks bias medium kedua;<\/span><\/p>\n<p><em><span style=\"font-weight: 400;\">v<\/span><\/em><sub><em><span style=\"font-weight: 400;\">1<\/span><\/em><\/sub><span style=\"font-weight: 400;\"> = cepat rambat cahaya di medium pertama (m\/s); dan<\/span><\/p>\n<p><em><span style=\"font-weight: 400;\">v<\/span><\/em><sub><em><span style=\"font-weight: 400;\">2<\/span><\/em><\/sub> <span style=\"font-weight: 400;\">= cepat rambat cahaya di medium kedua (m\/s).<\/span><\/p>\n<p><strong>2. Difraksi (pelenturan)<\/strong><\/p>\n<p><span style=\"font-weight: 400;\">Difraksi adalah pelenturan atau penyebaran gelombang saat melalui celah sempit. Contoh difraksi pada gelombang cahaya adalah terbentuknya rumbai (garis) gelap dan terang pada layar. Contoh difraksi pada gelombang bunyi adalah saat kamu berada di gang sempit, kamu masih bisa mendengar suara mobil atau kendaraan lain.<\/span><\/p>\n<p><strong>3. Refleksi (pemantulan)<\/strong><\/p>\n<p><span style=\"font-weight: 400;\">Refleksi adalah perubahan arah rambat gelombang saat bertemu dengan bidang batas dua medium. Pemantulan ini ternyata mengacu pada suatu hukum yang disebut hukum pemantulan. Adapun pernyataan hukum pemantulan adalah sebagai berikut.<\/span><\/p>\n<ol>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Besarnya sudut datang dan sudut pantul adalah sama.<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Gelombang datang, gelombang pantul, dan garis normal berada pada satu bidang datar.<\/span><\/li>\n<\/ol>\n<p><span style=\"font-weight: 400;\">Berikut ini ilustrasinya!<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-275567\" src=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2019\/09\/Karakteristik-Gelombang-Fisika-Kelas-11-i.png\" alt=\"\" width=\"223\" height=\"190\"><\/p>\n<p><strong>4. Dispersi<\/strong><\/p>\n<p><span style=\"font-weight: 400;\">Pernahkah kamu melihat pelangi? Peristiwa yang terjadi pada pembentukan pelangi adalah dispersi. Dispersi adalah penguraian warna polikromatik (putih) menjadi monokromatik saat seberkas cahaya dilewatkan melalui prisma. Cahaya polikromatik yang awalnya berwarna putih akan terurai menjadi merah, jingga, kuning, hijau, biru, nila, dan ungu. Berikut ini contoh ilustrasinya.<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-275566\" src=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2019\/09\/Karakteristik-Gelombang-Fisika-Kelas-11-j.png\" alt=\"\" width=\"355\" height=\"268\" srcset=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2019\/09\/Karakteristik-Gelombang-Fisika-Kelas-11-j.png 355w, https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2019\/09\/Karakteristik-Gelombang-Fisika-Kelas-11-j-300x226.png 300w, https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2019\/09\/Karakteristik-Gelombang-Fisika-Kelas-11-j-326x245.png 326w, https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2019\/09\/Karakteristik-Gelombang-Fisika-Kelas-11-j-80x60.png 80w\" sizes=\"(max-width: 355px) 100vw, 355px\" \/><\/p>\n<p><span style=\"font-weight: 400;\">Sinar yang datang dan keluar dari prisma akan membentuk suatu sudut yang disebut sudut deviasi. Besarnya sudut deviasi antara warna merah dan ungu dirumuskan sebagai berikut.<\/span><\/p>\n<p><span style=\"font-weight: 400;\"> <img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-275565\" src=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2019\/09\/Karakteristik-Gelombang-Fisika-Kelas-11-k.png\" alt=\"\" width=\"240\" height=\"261\"><\/span><\/p>\n<p><strong>5. Interferensi<\/strong><\/p>\n<p><span style=\"font-weight: 400;\">Interferensi adalah perpaduan antara dua gelombang cahaya. Interferensi bisa diamati dengan jelas jika berkas kedua gelombang bersifat koheren (amplitudo dan frekuensinya sama dengan fase tetap). Interferensi dibagi menjadi dua, yaitu interferensi konstruktif (menguatkan) dan destruktif (melemahkan). Ilustrasi keduanya bisa Quipperian lihat di gambar berikut.<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-275564\" src=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2019\/09\/Karakteristik-Gelombang-Fisika-Kelas-11-l.png\" alt=\"\" width=\"396\" height=\"152\" srcset=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2019\/09\/Karakteristik-Gelombang-Fisika-Kelas-11-l.png 396w, https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2019\/09\/Karakteristik-Gelombang-Fisika-Kelas-11-l-300x115.png 300w\" sizes=\"(max-width: 396px) 100vw, 396px\" \/><\/p>\n<p><strong>6. Efek Doppler<\/strong><\/p>\n<p><span style=\"font-weight: 400;\">Efek Doppler adalah efek berubahnya frekuensi bunyi akibat adanya kecepatan relatif antara sumber dan pengamat. Secara matematis, efek Doppler dirumuskan sebagai berikut.<\/span><\/p>\n<p><span style=\"font-weight: 400;\"> <img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-275563\" src=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2019\/09\/Karakteristik-Gelombang-Fisika-Kelas-11-m.png\" alt=\"\" width=\"143\" height=\"83\"><\/span><\/p>\n<p><strong>7. Polarisasi<\/strong><\/p>\n<p><span style=\"font-weight: 400;\">Polarisasi adalah terserapnya sebagian arah getar gelombang. Hal itu menyebabkan gelombang keluaran hanya memiliki satu arah saja. Gejala polarisasi ini hanya bisa terjadi pada gelombang transversal. Perhatikan contoh polarisasi berikut ini.<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-275562\" src=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2019\/09\/Karakteristik-Gelombang-Fisika-Kelas-11-n.png\" alt=\"\" width=\"437\" height=\"206\" srcset=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2019\/09\/Karakteristik-Gelombang-Fisika-Kelas-11-n.png 437w, https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2019\/09\/Karakteristik-Gelombang-Fisika-Kelas-11-n-300x141.png 300w\" sizes=\"(max-width: 437px) 100vw, 437px\" \/><\/p>\n<p><span style=\"font-weight: 400;\">Nah, sudah paham kan tentang karakteristik gelombang? Agar kamu lebih paham, perhatikan contoh soal berikut.<\/span><\/p>\n<h2><strong>Contoh soal 1<\/strong><\/h2>\n<p><span style=\"font-weight: 400;\">Gelombang air laut mendekati perahu dengan cepat rambat 10 m\/s. Jika jarak antara dua puncak gelombang yang berdekatan adalah 2 m, tentukan periode dan frekuensi gelombangnya!<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Pembahasan:<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Diketahui:<\/span><\/p>\n<p><em><span style=\"font-weight: 400;\">v<\/span><\/em><span style=\"font-weight: 400;\"> = 10 m\/s<\/span><\/p>\n<p><span style=\"font-weight: 400;\"> \u03bb = 2 m<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Ditanya: <\/span><em><span style=\"font-weight: 400;\">T<\/span><\/em><span style=\"font-weight: 400;\"> dan <\/span><em><span style=\"font-weight: 400;\">f<\/span><\/em><span style=\"font-weight: 400;\"> =\u2026?<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Pembahasan:<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Berdasarkan rumus cepat rambat gelombang, diperoleh:<\/span><\/p>\n<p><span style=\"font-weight: 400;\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-275561\" src=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2019\/09\/Karakteristik-Gelombang-Fisika-Kelas-11-o-.png\" alt=\"\" width=\"145\" height=\"159\">&nbsp;<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Frekuensinya dirumuskan sebagai berikut.<\/span><\/p>\n<p><span style=\"font-weight: 400;\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-275560\" src=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2019\/09\/Karakteristik-Gelombang-Fisika-Kelas-11-p.png\" alt=\"\" width=\"142\" height=\"72\">&nbsp;<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Jadi, periode dan periode gelombangnya berturut-turut adalah 0,2 s dan 5 Hz.<\/span><\/p>\n<h2><strong>Contoh soal 2<\/strong><\/h2>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-275559\" src=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2019\/09\/Karakteristik-Gelombang-Fisika-Kelas-11-q.png\" alt=\"\" width=\"615\" height=\"153\" srcset=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2019\/09\/Karakteristik-Gelombang-Fisika-Kelas-11-q.png 615w, https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2019\/09\/Karakteristik-Gelombang-Fisika-Kelas-11-q-300x75.png 300w\" sizes=\"(max-width: 615px) 100vw, 615px\" \/><\/p>\n<p><span style=\"font-weight: 400;\">Pembahasan:<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Diketahui:<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-275558\" src=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2019\/09\/Karakteristik-Gelombang-Fisika-Kelas-11-r.png\" alt=\"\" width=\"116\" height=\"167\"><\/p>\n<p><span style=\"font-weight: 400;\">Ditanya: <\/span><em><span style=\"font-weight: 400;\">r<\/span><\/em><span style=\"font-weight: 400;\"> =\u2026?<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Pembahasan:<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Berdasarkan hukum Snellius, diperoleh:<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-275557\" src=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2019\/09\/Karakteristik-Gelombang-Fisika-Kelas-11s.png\" alt=\"\" width=\"199\" height=\"323\" srcset=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2019\/09\/Karakteristik-Gelombang-Fisika-Kelas-11s.png 199w, https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2019\/09\/Karakteristik-Gelombang-Fisika-Kelas-11s-185x300.png 185w\" sizes=\"(max-width: 199px) 100vw, 199px\" \/><\/p>\n<p><span style=\"font-weight: 400;\">Jadi, besar sudut biasnya adalah 45<\/span><sup><span style=\"font-weight: 400;\">o<\/span><\/sup><span style=\"font-weight: 400;\">.<\/span><\/p>\n<h2><strong>Contoh soal 3<\/strong><\/h2>\n<p><span style=\"font-weight: 400;\">Perhatikan gambar berikut.<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-275556\" src=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2019\/09\/Karakteristik-Gelombang-Fisika-Kelas-11-t.png\" alt=\"\" width=\"234\" height=\"200\"><\/p>\n<p><span style=\"font-weight: 400;\">Tentukan besarnya sudut pantul pada cermin ketiga (\u03b8)!<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Pembahasan:<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Untuk menentukan besarnya sudut pantul di cermin ketiga, gunakan SUPER \u201cSolusi Quipper\u201d berikut ini.<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-275555\" src=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2019\/09\/Karakteristik-Gelombang-Fisika-Kelas-11-u.png\" alt=\"\" width=\"457\" height=\"144\" srcset=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2019\/09\/Karakteristik-Gelombang-Fisika-Kelas-11-u.png 457w, https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2019\/09\/Karakteristik-Gelombang-Fisika-Kelas-11-u-300x95.png 300w\" sizes=\"(max-width: 457px) 100vw, 457px\" \/><\/p>\n<p><span style=\"font-weight: 400;\">Bagaimana Quipperian, sudah semakin paham dengan materi gelombang ini? pada dasarnya, karakteristik gelombang itu mudah sekali untuk diamati dalam kehidupan sehari-hari. Belajar Fisika itu mudah, <\/span><em><span style=\"font-weight: 400;\">lho<\/span><\/em><span style=\"font-weight: 400;\">. Jangan pernah menyerah untuk terus belajar Fisika. Agar belajarmu lebih semangat, silakan gabung dengan <\/span><a href=\"https:\/\/learn.quipper.com\/\"><strong>Quipper Video<\/strong><\/a><span style=\"font-weight: 400;\">. Bersama Quipper Video, kamu bisa belajar kapanpun dan dimanapun dengan ribuan latihan soal beserta pembahasannya. Salam Quipper!<\/span><\/p>\n<p><strong>Penulis: Eka Viandari<\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Hai Quipperian, bagaimana kabarnya? Semoga selalu sehat dan tetap semangat ya! Coba tebak, bagaimana cara astronot berkomunikasi di luar angkasa? Apakah mereka bisa bercakap-cakap&hellip;<\/p>\n","protected":false},"author":99400369,"featured_media":275530,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_post_was_ever_published":false},"categories":[679384877,679384888],"tags":[],"ppma_author":[679386827,679386838],"class_list":["post-275550","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-fisika","category-mapel"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Karakteristik Gelombang - Fisika Kelas 11 - Quipper Blog<\/title>\n<meta name=\"description\" content=\"Dalam artikel ini, Quipper Blog akan membahas pengertian gelombang, karakteristik gelombang, besaran dalam gelombang, dan contoh-contoh soal.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.quipper.com\/id\/blog\/mapel\/fisika\/karakteristik-gelombang-fisika-kelas-11\/\" \/>\n<meta property=\"og:locale\" content=\"id_ID\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Karakteristik Gelombang - Fisika Kelas 11 - Quipper Blog\" \/>\n<meta property=\"og:description\" content=\"Dalam artikel ini, Quipper Blog akan membahas pengertian gelombang, karakteristik gelombang, besaran dalam gelombang, dan contoh-contoh soal.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.quipper.com\/id\/blog\/mapel\/fisika\/karakteristik-gelombang-fisika-kelas-11\/\" \/>\n<meta property=\"og:site_name\" content=\"Quipper Blog\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/QuipperVideoID\/\" \/>\n<meta property=\"article:published_time\" content=\"2019-09-25T10:17:03+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2023-02-07T08:12:59+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/quipperhome.wpcomstaging.com\/wp-content\/uploads\/2019\/09\/Gelombang-Berjalan-dan-Stasioner-Fisika-Kelas-11-c.png\" \/>\n\t<meta property=\"og:image:width\" content=\"800\" \/>\n\t<meta property=\"og:image:height\" content=\"533\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"sereliciouz, Cecep Saeful Mukti, S.Pd.\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@quipper_id\" \/>\n<meta name=\"twitter:site\" content=\"@quipper_id\" \/>\n<meta name=\"twitter:label1\" content=\"Ditulis oleh\" \/>\n\t<meta name=\"twitter:data1\" content=\"sereliciouz\" \/>\n\t<meta name=\"twitter:label2\" content=\"Estimasi waktu membaca\" \/>\n\t<meta name=\"twitter:data2\" content=\"11 menit\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.quipper.com\\\/id\\\/blog\\\/mapel\\\/fisika\\\/karakteristik-gelombang-fisika-kelas-11\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/quipperhome.wpcomstaging.com\\\/mapel\\\/fisika\\\/karakteristik-gelombang-fisika-kelas-11\\\/\"},\"author\":{\"name\":\"sereliciouz\",\"@id\":\"https:\\\/\\\/quipperhome.wpcomstaging.com\\\/#\\\/schema\\\/person\\\/b08224c7b72a87b156db30c3b032083b\"},\"headline\":\"Karakteristik Gelombang &#8211; 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