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A sound wave is traveling in warm air when it hits a layer of cold, dense air. If the sound wave hits the cold air interface at an angle of 22❝, what is the angle of refraction? Assume that the cold air temperature is -10❝C and the warm air temperature is +15❝C. The speed of sound as a function of temperature can be approximated by v=(331+0.60T)m/s, where T is in ❝C.
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Added Thu, 06 Aug '15
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Snell's law of refraction states that sin i/sinr = speed of sound in 1/ speed of sound in 2

v1= 331+( 0.6 * 15)= 340 m/s

v2= 331+ (0.6 * -10)= 325 m/s

0.375/ sin r = 340/325

sinr = 0.3585

Hence r= angle of refraction= 21 deg
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