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3. A wave moving in the first medium with a velocity of 4.8 m/s and a wavelength of .52 m strikes an interface with the

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3. A wave moving in the first medium with a velocity of 4.8 m/s and a wavelength of .52 m strikes an interface with the second medium at angle of 270 relative to the normal and passes into it. If the velocity is increased to 7.5 m/s, what is the angle of the wave in the second medium? a. 360 b. 510 c. 450 d. 600

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