Wave Motion 4 Question 4
4. A stationary source emits sound waves of frequency
(Take, speed of sound
(2019 Main, 10 April I)
(a) 12,16
(b) 12,18
(c) 16,14
(d) 8,18
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Solution:
- Given,
Frequency of sound source
Let
When observer moves away from the source, Apparent
frequency,
When observer moves towards the source,
Apparent frequency,
Substituting values in Eq. (i), we get
Substituting values in Eq. (ii), we get
Thus, their respective speeds (in
