The intensity ratio of waves is 25 : 9. What is the ratio of their amplitudes?
The intensity ratio of waves is 25 : 9. What is the ratio of their amplitudes?
A). 50 : 18
B). 25 : 9
C). 3 : 5
D). 5 : 3
1 answers
5 : 3
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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