Monday, October 17, 2011

Pemanfaatan Gelombang Laut


selancar(www.matanews.com)
Gelombang dalam perambatannya membawa inergi atau dalam kata lain gelombang memindahkan energi. Salah satu contoh sederhana energi dapat merambat melalui gelombang adalah panas yang sampai ke permukaan bumi adalah energi yang dibawa oleh gelombang  yaitu gelombang cahaya. Contoh lain adalah energi yang terdapat pada gelombang laut.

Gelombang  laut  termasuk gelombang  mekanik dengan medium untuk perambatannya adalah  air.  Gelombang laut disebut  gelombang ombak  dalam perambatannya  membawa energi  dari tengah laut  menuju pantai . Energi gelombang ombak inilah yang  dimanfaatkan para peselancar  untuk meluncur di atas ombak.

Gelombang ombak yang ditimbulkan oleh arus samudera, angin, dan tarikan pasang surut bulan memulai gerakannya  di laut(samudera) lepas jauh dari pantai.  Saat bergerak menuju pantai gelombang melambat dan mengumpul menjadi lebih tinggi. Hal ini terjadi akibat makin menuju kearah pantai  dasar laut makin dangkal (perhatikan gambar)

gelombang ditengah laut

gelombang mendekati pantai

Pada saat gelombang timbul jauh ditengah laut gelombang lebar berbentu simetris dan bergerak sangat cepat. Pada saat gelombang mendekat ke pantai yang dasar lautnya mulai dangkal maka gelombang akan, melambat  dan mengumpul sehingga puncaknya akan tumpah pada gelombang tersebut. Para peselancar memanfaatkan  gerakan ini dengan menaiki sebuah gelombang  yang mulai pecah untuk meluncur. Dengan berdiri diatas papan  dan sedikit di belakang bagian tengahnya.  Dengan menyeimbangkan badannya sambil sedikit mendorongkan hidung papan diatas air  kemudian menggerakkan papan menyamping memotong gelombang . Selanjutnya papan akan didorong oleh suatu gabungan gaya  grafitasi dan gaya apung  serta gerak gelombang itu sendiri kedepan menuju pantai.

Itulah salah satu pemanfaatan energi  gelombang dalam bidang olah raga dan pariwisata  tentunya kita berharap suatu saat gelombang ombang bisa dimanfaatkan buat yang lain misalnya menjadi energi listrik. Bila berhasil memanfaatkan energi gelombang untuk energi listrik bisa menambah kekurangan energi di tanah air khususnya energi listrik dan gelombang laut merupakan sumber energi yang tidak akan habis.

referensi : dari berbagai sumber

13 comments:

  1. nice post gan. harusnya Indonesia mulai melirik gelombang laut sebagai energi alternatif mengingat laut di Indonesia cukup luas dan ombaknya lumayan besar

    ReplyDelete
  2. Pemanfaatan gelombang laut juga bisa dipakai PLTU brada.

    ReplyDelete
  3. ilmu fisika sangat sulit gan buatku
    salam dan sukses gan

    ReplyDelete
  4. @pirly, selamat datang di blog aku yang baru, itu yang diharapkan semoga wacana itu bisa terwujud
    @Taman bacaan, pada PLTU sudah mulai dimanfaatkan muat pendingin jadi belum diambil energinya
    @obat sakit 2011, ilmu fisika menurut murid saya juga sulit gan ini hanya memperkenlkan blog fisika saja supaya tidak terkesan bahwa fisika itu eksklusif

    ReplyDelete
  5. wah mengingatkan ku akan zaman sekolah dulu, inget gambarnya, pelajaran apa yg disekolah dulu tentang gelombang :)

    ReplyDelete
    Replies
    1. ya pelajaran fisika, atau olah raga

      Delete
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