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  1. The intensity ratio of waves is 25 : 9. What is the ratio of their amplitudes?

    2. A.

     50 : 18
    B.

     25 : 9
    C.

     3 : 5
    D.

     5 : 3

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    Answer : Option D

    Explanation :

    In general, the intensity of a wave is proportional to the square of its amplitude. This has an important implication: relative intensity can be obtained by squaring relative amplitude.
    I α a2
    So if the intensity ratio is 25:9, the amplitude ratio will be 5:3.

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