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A light ray enters a rectangular block of plastic at an angle of 0₁ = 47.5° and emerges at an angle of 02 = 78.5° as shown in the figure below.
n
(a) Determine the index of refraction of the plastic.
=
(b) If the light ray enters the plastic at a point L
travel through the plastic?
ns
50.0 cm from the bottom edge, what time interval is required for the light ray to

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