MHT CET 2025 Physics question

When source of sound and observer both are moving towards each other, the observer will hear

(A)low frequency, low wavelength
(B)low frequency, high wavelength
(C)high frequency, low wavelengthCorrect
(D)high frequency, high wavelength

Answer: (C)

Solution

By the Doppler effect, ; with both moving towards each other the numerator increases and the denominator decreases, so (higher frequency). The wavelength of the wave reaching the observer is , because the source moving towards the observer

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Question ID VK-102037