A ray of light strikes a flat glass block at an incidence angle of 8₁ = 39.8°. The glass is 2.00 cm thick and has an index of refraction that equals no = 1.65. 2.00 cm (a) What is the angle of refraction, 82, that describes the light ray after it enters the glass from above? (Enter your answer in degrees to at least 2 decimal places.) 22.83 (b) with what angle of incidence, 83, does the ray approach the interface at the bottom of the glass? (Enter your answer in degrees to at least 2 decimal places.) 22.83 (c) with what angle of refraction, 84, does the ray emerge from the bottom of the glass? (Enter your answer in degrees to at least 1 decimal place.) 39.8 O (d) The distance d separates the twice-bent ray from the path it would have taken without the glass in the way. What is this distance (in cm)? 0.82 x Think of the ray's path within the glass as the hypotenuse of a right triangle with opening angle 82. Use trigonometry to calculate the length of that hypotenuse. The think of it as the hypotenuse of a second right triangle, one whose opening angle is (0₁-0₂). The length of that triangle's shortest side equals the separation, d. cn (e) At what speed (in m/s) does the light travel within the glass? 182000000 m/s (f) How many nanoseconds does the light take to pass through the glass along the angled path shown here? X 0.11 Davis

Refraction is a change in the direction of light rays when they travel from one medium to another. It is the bending of light when it goes through different media.

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