A ray of light travels through air until it strikes the interface between the air and another medium. The incident ray makes an angle of 61 = 41.0 with the normal, as shown in the figure below. Upon passage into the second medium, the ray is refracted, emerging from the interface at an angle 92 with respect to the normal. Air Second medium @ (a) Suppose that the second medium is fused quartz. What is the angle of refraction, 92 (in degrees)? (Enter your answer to at least one decimal place.) (b) Suppose that the second medium is water. What is the angle of refraction, 62, in this case (in degrees)? (Enter your answer to at least one decimal place.) (c) Finally, suppose that the second medium is ethyl alcohol. What is the angle of refraction, 62, in this case (in degrees)? (Enter your answer to at least one decimal place.) A person walks into a room that has, on opposite walls, two plane mirrors producing multiple images. Find the distances from the person to the first three images seen in the left-hand mirror, when the person is 7.00 ft from the mirror on the left wall and 11.7 ft from the mirror on the right wall. first image ft second image ft third image ft Need Help? [TRsaair] A spherical mirror is to be used to form an image, six times as tall as an object, on a screen positioned 4.8 m from the mirror. (@) Describe the type of mirror required. The mirroris @ ---Mirror Type--- mirror and it has a focal length of m. (b) Where should the mirror be positioned relative to the object? The object should be m in front of the mirror. A 1.75-m-tall person stands 9.20 m in front of a large, concave spherical mirror having a radius of curvature of 5.20 m. HINT (a) Determine the mirror's focal length (in m). m (b) Determine the image distance (in m). m (c) Determine the magnification. (d) Is the image real or virtual? O real O virtual (e) Is the image upright or inverted? O upright O inverted