Q251
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
AnswerAnswer: Option D
Solution
Answer: Option D
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.