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A light ray enters a rectangular block of plastic at an angle of 81 = 42.5° and emerges at an angle of 82=74.0° as shown in the figure below. a) Determine the index of refraction of the plastic. QUESTION 2 b) If the light ray enters the plastic at a point L= 50.0 cm from the bottom edge, what time (in ns) interval is required for the light ray to travel through the plastic? QUESTION 3 A narrow beam of light is incident from air onto the surface of glass with index of refraction 1.54. Find the angle of incidence for which the corresponding angle of refraction is half the angle of incidence (in degree). (Suggestion: You might want to use the trigonometric identity sin 20 = 2 sin 0 cos 8.)

A light ray enters a rectangular block of plastic at an angle of 81 = 42.5° and emerges at an angle of 82=74.0° as shown in the figure below. a) Determine the index of refraction of the plastic. QUESTION 2 b) If the light ray enters the plastic at a point L= 50.0 cm from the bottom edge, what time (in ns) interval is required for the light ray to travel through the plastic? QUESTION 3 A narrow beam of light is incident from air onto the surface of glass with index of refraction 1.54. Find the angle of incidence for which the corresponding angle of refraction is half the angle of incidence (in degree). (Suggestion: You might want to use the trigonometric identity sin 20 = 2 sin 0 cos 8.)

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QUESTION 1 A light ray enters a rectangular block of plastic at an angle of 81 = 42.5 and emerges at an angle of 82=74.0° as shown in the figure below. a) Determine the index of refraction of the plastic. QUESTION 2 b) If the light ray enters the plastic at a point L= 50.0 cm from the bottom edge, what time (in ns) interval is required for the light ray to travel through the plastic? QUESTION 3 A narrow beam of light is incident from air onto the surface of glass with index of refraction 1.54. Find the angle of incidence for which the corresponding angle of refraction is half the angle of incidence (in degree). (Suggestion: You might want to use the trigonometric identity sin 20 = 2 sin 0 cos 8.)
Transcribed Image Text:QUESTION 1 A light ray enters a rectangular block of plastic at an angle of 81 = 42.5 and emerges at an angle of 82=74.0° as shown in the figure below. a) Determine the index of refraction of the plastic. QUESTION 2 b) If the light ray enters the plastic at a point L= 50.0 cm from the bottom edge, what time (in ns) interval is required for the light ray to travel through the plastic? QUESTION 3 A narrow beam of light is incident from air onto the surface of glass with index of refraction 1.54. Find the angle of incidence for which the corresponding angle of refraction is half the angle of incidence (in degree). (Suggestion: You might want to use the trigonometric identity sin 20 = 2 sin 0 cos 8.)
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