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Consider a source of sound S, and an obs...

Consider a source of sound `S`, and an observer `P`. The source emits sound of frequency `N_(0)`. The frequency observed by `P` is found to be `N_(1)` if P approaches S at a speed v and S is stationary; `N_(2)` if S approaches P at a speed v and P is stationary and `N_(3)` if each of P and S has speed v/2 towards one another ​

A

`n_(1) = n_(2) =n_(3)`

B

`n_(1) lt n_(2)`

C

`n_(3) gt n_(0)`

D

`n_(3)` lies between `n_(1)` and `n_(2)`

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The correct Answer is:
B, C, D
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