41. 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
Solution: 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.
