{"id":10570,"date":"2018-01-29T08:15:01","date_gmt":"2018-01-29T01:15:01","guid":{"rendered":"https:\/\/example.com\/?p=10570"},"modified":"2023-12-12T12:08:35","modified_gmt":"2023-12-12T05:08:35","slug":"peristiwa-pembiasan-cahaya","status":"publish","type":"post","link":"https:\/\/www.ruangguru.com\/blog\/peristiwa-pembiasan-cahaya","title":{"rendered":"Peristiwa Pembiasan Cahaya | Fisika Kelas 11"},"content":{"rendered":"

\"Peristiwa <\/p>\n

Pernahkah kamu perhatikan, mengapa kolam renang atau sungai yang airnya jernih terlihat seperti dangkal? Padahal kolam renang atau sungai tersebut sebenarnya dalam lho<\/em>. Atau kamu pernah mencoba mencelupkan pensil ke dalam gelas berisi air, namun pensil tersebut terlihat seperti patah? Nah, <\/em>peristiwa-peristiwa tersebut merupakan contoh dari pembiasan cahaya. Apa itu peristiwa pembiasan cahaya?<\/p>\n

<\/span><\/span><\/p>\n

Pengertian Pembiasan Cahaya<\/span><\/h2>\n

Pembiasan cahaya merupakan peristiwa perubahan arah rambat cahaya ketika berpindah dari satu medium ke medium lain yang kerapatan optiknya berbeda. Penyebab terjadinya pembiasan cahaya dibagi menjadi 2 yaitu:<\/p>\n

    \n
  1. Ketika sinar datang dari medium yang kurang rapat menuju medium yang lebih rapat maka sinar datang akan dibiaskan mendekati garis normal. Contohnya ketika sinar datang melalui medium udara menuju air.<\/li>\n
  2. Ketika sinar datang dari medium yang lebih rapat menuju medium yang kurang rapat maka sinar datang akan dibiaskan menjauhi garis normal. Contohnya ketika sinar datang melalui medium air menuju udara.<\/li>\n<\/ol>\n
    \"pembiasan<\/div>\n

    Sumber : pakmono.com<\/em><\/p>\n

    Hukum Snellius<\/h2>\n

    Pembiasan cahaya dijelaskan menggunakan Hukum Snellius<\/p>\n

    \"Rumus<\/p>\n

    Oke<\/em>, setelah mengetahui penjelasan dan rumus pembiasan cahaya, sekarang kita lanjut ke contoh soal dan pembahasan berikut ini, kuy<\/em>!<\/p>\n

      \n
    1. Perhatikan gambar di bawah ini. Jika sudut datang sinar adalah 53\u00ba dan sudut bias sebesar 30\u00ba. Tentukan nilai indeks bias medium kedua jika medium pertama adalah udara!<\/li>\n<\/ol>\n
      \"Peristiwa<\/div>\n

      Pembahasan : <\/strong><\/p>\n

      Diketahui : <\/strong><\/p>\n

      n1<\/sub> = indeks bias medium 1 udara = 1<\/p>\n

      \u03b81<\/sub> = sudut datang = 53\u00ba<\/p>\n

      \u03b82<\/sub> = sudut bias = 30\u00ba<\/p>\n

      Ditanya : <\/strong>indeks bias medium 2 = n2
      <\/sub><\/p>\n

      Jawab :<\/strong><\/p>\n

      n1<\/sub> sin \u03b81<\/sub> = n2<\/sub> sin \u03b82<\/sub><\/p>\n

      1 x sin 53\u00ba = n2 sin 30\u00ba<\/p>\n

      1 x  0,8  = n2 x 0,5<\/p>\n

      n2<\/sub> =   1,6<\/span><\/p>\n

      Baca Juga:<\/strong><\/span> Memahami Perbedaan Getaran dan Gelombang<\/strong><\/a><\/span><\/p>\n

      Nah, <\/em>apakah kamu sudah paham? Ternyata, banyak peristiwa pembiasan cahaya disekitar kita. Kalau kamu masih penasaran peristiwa pembiasan cahaya lainnya, dan punya pertanyaan tentang materi ini, langsung aja konsultasi lewat Brain Academy Online. <\/a>Diajarin sama STAR Master Teacher sampai paham!<\/p>\n

      \"BA<\/a><\/p>\n

       <\/p>\n","protected":false},"excerpt":{"rendered":"

        Pernahkah kamu perhatikan, mengapa kolam renang atau sungai yang airnya jernih terlihat seperti dangkal? Padahal kolam renang atau sungai tersebut sebenarnya dalam lho. Atau kamu pernah mencoba mencelupkan pensil ke dalam gelas berisi air, namun pensil tersebut terlihat seperti patah? Nah, peristiwa-peristiwa tersebut merupakan contoh dari pembiasan cahaya. Apa itu peristiwa pembiasan cahaya?<\/p>\n","protected":false},"author":79,"featured_media":10570,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_knawatfibu_url":["https:\/\/cdn-web.ruangguru.com\/landing-pages\/assets\/hs\/Header%20blog%20RG\/Fisika_11.jpg"],"_edit_last":["1"],"_edit_lock":["1702357715:1"]},"categories":[513,518],"tags":[127,31,37],"class_list":["post-10570","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-fisika","category-fisika-sma-kelas-11","tag-fisika-xi","tag-kelas-11","tag-sma"],"yoast_head":"\nPeristiwa Pembiasan Cahaya | Fisika Kelas 11<\/title>\n<meta name=\"description\" content=\"  Pernahkah kamu perhatikan, mengapa kolam renang atau sungai yang airnya jernih terlihat seperti dangkal? Padahal kolam renang atau sungai tersebut\" \/>\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.ruangguru.com\/blog\/peristiwa-pembiasan-cahaya\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Peristiwa Pembiasan Cahaya | Fisika Kelas 11\" \/>\n<meta property=\"og:description\" content=\"  Pernahkah kamu perhatikan, mengapa kolam renang atau sungai yang airnya jernih terlihat seperti dangkal? 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