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MHT CET Physics question

PhysicsWavesMHT CET

A bat flying above lake emits ultrasonic sound of 100 kHz. When this wave falls on the water surface, it is partly reflected and partly transmitted. The wavelengths of the reflected and the transmitted waves are (The speed of sound in air is 340 m/s and in water is 1450 m/s)

Answer: (B)

Solution

Frequency stays 100 kHz in both media: mm for the reflected wave, and the transmitted wave in water has

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Question ID VK-070088