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horsena [70]
3 years ago
13

When light passes from air into water at an angle of 60° from the normal, what is the angle of refraction? (40.6°)

Physics
1 answer:
matrenka [14]3 years ago
5 0

Answer:

40.6°

Explanation:

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A 50.0 Watt stereo emits sound waves isotropically at a wavelength of 0.700 meters. This stereo is stationary, but a person in a
photoshop1234 [79]

Answer:

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a) To calculate the frequency of sound waves that car receives, you take into account the Doppler effect. In this case (observer moves away of the source) you have the following formula:

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where

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vo: speed of the observer = 40.0 m/s

vs: speed of the source = 0 m/s (stationary)

You replace the values of all parameters in the equation (1):

To calculate f' you first calculate the frequency of the sound wave, by using the following formula:

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f=\frac{v}{\lambda}=\frac{343m/s}{0.700m}=480Hz

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f'=(490Hz)(\frac{343m/s-40.0m/s}{343m/s})=432Hz

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I=\frac{P}{4\pi r^2}

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