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A light ray is pointed at the surface of a block of fused quartz at an...

A light ray is pointed at the surface of a block of fused quartz at an angle of 45.0° with respect to the normal (a line perpendicular to the surface at the spot where the ray hits the block).

A fraction of the light is reflected and the rest refracted. What is the angle (in degrees) between the reflected and refracted rays?

_____°

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