I wanted to know the solution for the question on Doppler’s effect in the JEE Main 2015 ONLINE exam conducted on 10^th April. The question is:
A bat moving at 10 ms^-1towards a wall sends out a signal of 8000Hz towards it. On reflection it hears a frequency f. Value of f in hertz is:
(Speed of sound = 320 ms^-1)
1. 8424 2. 8000 3. 8258 4. 8516

Question

Saurabh Kumar · Answer

(f 2 ) apparent = (f 1 ) apparent (v sound + v obs / v sound ) (f 1 ) apparent = (f 0 )( v sound / v sound &ndash; v source ) Put the value get the answer....

Varun · Answer

I know that, I am confused with the conventions

pa1 · Answer

) source – v sound / v sound )( v 0 = (f apparent ) 1 )(f sound / v obs + v sound (v apparent ) 1 = (f apparent ) 2 (f

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