A bat moving at 10 ms -1 towards a wall sends a sound signal of 8000 Hz towards it. On reflection it hears a sound of frequency . The value of in Hz is close to
(speed of sound=320 ms-1)
8258
8516
8000
8424
As we learnt in
Frequency of sound when source and observer are moving towards each other -
- wherein
Speed of sound
Speed of observer
speed of source
Original frequency
apparent frequency
Reflected frequency of sound reaching bat.
Correct option is 2.
Option 1)
8258
This is an incorrect option.
Option 2)
8516
This is the correct option.
Option 3)
8000
This is an incorrect option.
Option 4)
8424
This is an incorrect option.
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