A source of sound emitting a note of frequency 200 Hz moves towar… - Vidyadip

MCQ

A source of sound emitting a note of frequency $200 Hz$ moves towards an observer with a velocity $v$ equal to the velocity of sound. If the observer also moves away from the source with the same velocity $v$, the apparent frequency heard by the observer is .... $Hz$

A
$50$
B
$100$
C
$150$
✓
$200$

✓

Answer

Correct option: D.

$200$

d
(d) Since there is no relative motion between observer and source, therefore there is no apparent change in frequency.

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