An underwater scuba diver sees the Sun at an apparent angle of 44.0° above the horizontal. What is the actual elevation angle of the Sun above the horizontal? (Use 1.333 for the index of refraction of water.)

A ray of light enters a narrow prism along the normal as shown. Calculate the angle (degrees) at which the ray exits the prism, relative to North (i.e. up the page, not the normal to the glass). The index of refraction of the prism is n = 1.54. The angle of the prism is theta = 19.42 deg.

Use the exact values you enter to make later calculations. A ray of light strikes a flat, 2.00-cm-thick block of glass (n 1.34) at an angle of 0 = 37.6° with respect to the normal (see figure below). 2.00 cm (a) Find the angle of refraction at the top surface and the angle of incidence at the bottom surface. 27.06 O (b) Find the refracted angle at the bottom surface. 37.56 (c) Find the lateral distance d by which the light beam is shifted. 0.649 x cm (d) Calculate the speed of light in the glass. m/s (e) Calculate the time required for the light to pass through the glass block. S (f) Is the travel time through the block affected by the angle of incidence? Yes, a slightly larger angle will decrease the travel time. No Yes, a slightly larger angle will increase the travel time.

A light ray propagates in Material 1 with index of refraction n₁ = 1.25, strikes an interface, then passes into Material 2 with index of refraction n₂ = 1.37. The angle of incidence at the interface is 0₁ = 27.3°. Determine the angle of refraction 02. 0₂ € 1 Material 1 Material 2