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What is hygiene principal

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What is hygiene principal

    • Posted by Kartikesh Jha 5 years, 7 months ago

    CBSE > Class 12 > Physics
    • 1 answers

    Muskaan Vig 5 years, 7 months ago

    Huygens principle states that every point on wavefromt is source of new disturbance called secondary wavelets..these secondary wavelets spread in all direction with speed of light and add upto to form a new wavefront later....

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