INDEX OF REFRACTION INDEX OF REFRACTION Medium Index of Refraction Medium Index of Refraction Air 1.0 Polycarbonate 1.586 Water 1.33 Dense Flint Glass 1.616 Boro Silicate Crown Glass 1.509 Dense Flint Crown Glass 1.62 Cedar Wood Oil 1.51 Light Flint Glass 1.676 Hard Crown Glass 1.5175 Extra Dense Flint 1.690 Spectacle Crown Glass 1.52 Barium Crown 1.701 Canada Balsam 1.526 Double Extra Dense Flint Glass 1.7129 Quartz 1.55 Diamond 2.4173

7. speed in vacuum. The speed of light inside some material is reduced by 25% from the What is the index of refraction of the material? a) n = = 3 b) n = 4 c) n = 34 d) Something else. (Please explain.)

pility: Good to go The sun is 150,000,000 km from earth; its diameter is 1,400,000 km. For a science project on solar power, a student uses a 24-cm-diameter converging mirror with a focal length of 53 cm to focus sunlight onto an object. This casts an image of the sun on the object. For the most intense heat, the image of the sun should be in focus. a. Where should the object be placed? b. What is the diameter of the image? 2 c. The intensity of the incoming sunlight is 1050 W/m². What is the total power of the light captured by the mirror? d. What is the intensity of sunlight in the projected image? Assume that all of the light captured by the mirror is focused into the image. Focus 88 E 84°F ^

6. A sheet of glass has an index of refraction nalass = 1.45. Assume that the index of refraction for air is na= 1.00, Light is incident on the sheet of glass at an angle of incidence of 60°, as shown in the figure below. a. Calculate and label the size of each angle (in degrees) on the figure, including angles of incidence and refraction at each of the two parallel surfaces shown. 60 degrees Air na = 1.00 Glass " = 1.45 Air ng = 1.00 b. Calculate the velocity of the light as it travels in the glass.