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Transcribed Image Text:Q4. A plane sound wave in air at 20°C, with wavelength 589 mm, is incident on a
smooth surface of water at 25°C at an angle of incidence of 13.0°. Determine:
a) the angle of refraction for the sound wave and
b) the wavelength of the sound in water.
Then, a narrow beam of sodium yellow light, with wavelength 589 nm in
vacuum, is incident from air onto a smooth water surface at an angle of
incidence of 13.0°. Determine:
e) the angle of refraction and
d) the wavelength of the light in water.
e) Compare and contrast the behavior of the sound and light waves in this
problem.
Hint: (in air at 20°C, the speed of sound is 343 m/s, the speed of sound in
water at 25°C is 1493 m/s).
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