Wave Motion 5 Question 9
9. The distribution of the sound intensity of the whistle as observed by the passengers in train $A$ is best represented by
(2007, 4M)
(a)
(b)
(c)
(d)
Show Answer
Answer:
Correct Answer: 9. (a)
Solution:
- For the passengers in train $A$, there is no relative motion between source and observer, as both are moving with velocity $20 m / s$. Therefore, there is no change in observed frequencies and correspondingly there is no change in their intensities. Therefore, the correct option is (a).
