Question: Question 13 : A light ray enters a rectangular block of plastic at an angle of 01 = 45.5 and emerges at an angle of
Question 13 :

A light ray enters a rectangular block of plastic at an angle of 01 = 45.5 and emerges at an angle of .92 = 75.5\" as shown in the gure below. (a) Determine the index of refraction of the plastic. |:| (b) If the light ray enters the plastic at a point L = 50.0 cm from the bottom edge, what time interval is required for the light ray to travel through the plastic? :ns
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