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MHT CET 2026 (20 Apr, Shift 1) · Doppler Effect

Doppler Effect question from MHT CET 2026 (20 Apr, Shift 1)

Q3MHT CET 2026 · 20 APR · SHIFT 1Easy

Doppler Effect

A train is moving towards a stationary observer with speed $34$ m/s. A train sounds a whistle of frequency $450$ Hz. If the speed of sound is $340$ m/s, the frequency heard by the observer in Hz is

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Answer: (c)

Source approaching: $n' = n\frac{v}{v - v_s}$ .
$n' = 450 \times \frac{340}{306} = 450 \times \frac{10}{9}$
$n' = 500$ Hz. So the answer is (c) $500$ .

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