H 2.0m d A scuba diver training in a pool looks at his instructor as shown in the figure. The angle between the ray in the water and the perpendicular to the water is 0: 25 ° (a) What angle does the ray from the instructor's face make with the perpendicular to the water at the point where the ray enters? Angle, 0: о (b) Find the height, H, of the instructor's head above the water, noting that you will first have to calculate the angle of incidence. Note the scuba diver perceives the instructor as though the incident ray never refracted. Height, H: m (c) Find the apparent depth, x, of the diver's head below water as seen by the instructor. In the figure, d=2.00 m Note the instructor perceives the diver as though the incident ray never refracted. Apparent depth, x: m

A ray of light crosses the boundary between some substance with n = 1.54 and air, going from the substance into air. If the angle of incidence is 29◦ what is the angle of refraction?   Calculate to 1decimal.

8. Light strikes the 70° glass prism (n = 1.51) with an angle of incidence of 50.0°. Calculate the angle that the light leaves the prism. (73.9°) 70d 9. Light is incident on an equilateral Lucite prism (n = 1.5) at an angle of 35°. Calculate the angle that the light leaves the prism. (66°) %3D ? 10. Freddie the fish shines his flashlight upward from under water. If Freddie shines his flashlight at an incident angle of 20°, at what angle does the light leave the water? (27°) В. A. Beyond what critical angle will the light no longer be able to leave the water? (48.8°) 11. From inside an aquarium a ray of light is directed at the glass so the angle of incidence, in water, is 30°. (a) Determine the angle of refraction when the ray emerges from the glass into the air. (b) If the angle of incidence in the water is 52° at what angle will the rays emerge from the glass? (42°, no ray emerges) water air n = 1.33 n = 1.00 30° glass n = 1.50

Consider a light ray that enters and exits a prism as shown below. Suppose the material of the prism is unknown but the surrounding material has index of refraction n, = 1.3. Find the index of refraction for the material of the prism. n2 n1 22° 38° 9. n, = А. 1.479 D. 1.586 В. 1.635 Е. 1.333 С. 1.389 F. 1.527

To the nearest hundredth of an hour, how many hours are required before a radio signal from a space probe near the planet Uranus reaches Earth, 1.607 *109 km away? A light ray is reflected from a mirror with an angle 15.2° to the normal. What was the angle of incidence? Light passes through a transparent substance at a speed of 2.256 ×108 m/s. Based on the following table, what is the material? index of refraction (n = =) Glass Diamond Substance Ice Water Ethyl alcohol (Click to select) ✓ (Click to select) Ice Diamond Glass Ethyl alcohol Water 1.50 2.42 1.31 1.33 1.36 The wavelength of a monochromatic light source is measured to be 5.06 x10-7 m in a diffraction experiment. (a) What is the frequency? x 1014 Hz (b) What is the energy of a photon of this light? 10-19 J

A point source of light is submerged 2.30 m below the surface of a lake and emits rays in all directions. On the surface of the lake, directly above the source, the area illuminated is a circle. What is the maximum radius that this circle could have?

6.18