SATHEE: Wave Motion 5 Question 22

Wave Motion 5 Question 22

22. A plane wave of sound travelling in air is incident upon a plane water surface. The angle of incidence is $60^{\circ}$ . Assuming Snell’s law to be valid for sound waves, it follows that the sound wave will be refracted into water away from the normal. $(1984, 2 M$ )

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Solution:

For sound wave water is rarer medium because speed of sound wave in water is more. When a wave travels from a denser medium to rarer medium it refracts away from the normal.

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Wave Motion 5 Question 22

22. A plane wave of sound travelling in air is incident upon a plane water surface. The angle of incidence is 60∘. Assuming Snell’s law to be valid for sound waves, it follows that the sound wave will be refracted into water away from the normal. (1984,2M )

Integer Answer Type Question

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22. A plane wave of sound travelling in air is incident upon a plane water surface. The angle of incidence is $60^{\circ}$ . Assuming Snell’s law to be valid for sound waves, it follows that the sound wave will be refracted into water away from the normal. $(1984, 2 M$ )