A small source of sound moves on a circle as shown in the figure and an observer is standing on $O.$ Let $n_1,\, n_2$ and $n_3$ be the frequencies heard when the source is at $A, B$ and $C$ respectively. Then
A small source of sound moves on a circle as shown in the figure and an observer is standing on $O.$ Let $n_1,\, n_2$ and $n_3$ be the frequencies heard when the source is at $A, B$ and $C$ respectively. Then
- A
$n_1\,\, >\,\, n_2\,\, >\,\, n_3$
- B
$n_2\,\, >\,\, n_3\,\, >\,\, n_1$
- C
$n_1\,\, =\,\, n_2\,\, >\,\, n_3$
- D
$n_2\,\, >\,\, n_1\,\, >\,\, n_3$
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