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MHT CET Physics question

PhysicsWavesMHT CET

A plane wave with wavelength 1.8 cm travels from deep water into a shallow water. Velocity of waves on the surface of deep water is 36 cm/sec. The velocity of waves on the surface of shallow water, if wavelength is 1.0 cm, is

Answer: (B)

Solution

Frequency stays the same across the boundary, so and $ = 36× = 20\

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Question ID VK-070027