Light that is initially travelling in a layer of diamond is incident on a layer of sapphire as shown inFigure 5. The sapphire layer has thickness T = 3 cm. The angle inside the sapphire is 6, = 50°.When the light reaches a third layer, it experiences total internal reflection. The material of thethird layer is unknown. Figure 5 also shows a table with indices of refraction for various materials.Index ofDiamondMaterialRefractionIce1.31Fluorite1.43SapphireSapphire1.77?Diamond2.42Titanium2.90DioxideFigure 514. What is the incident angle 8, inside the diamond?a) 8, x 24°b) e, x 34°c) 8, x 44°d) e, x 54°e) 8, x 64°15. What is the horizontal distance x travelled inside the sapphire?a) x x 6.4 cmb) x x 7.2 cmc) x x 8.6 cmd) x x 9.3 cme) x x 12.1 cm16. Which of the following could be the material of the third layer?a) Ice onlyb) Fluorite onlyc) Either ice or fluorited) Titanium dioxide onlye) None of the above

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Light that is initially travelling in a layer of diamond is incident on a layer of sapphire as shown in Figure 5. The sapphire layer has thickness T = 3 cm. The angle inside the sapphire is 6, = 50°. When the light reaches a third layer, it experiences total internal reflection. The material of the third layer is unknown. Figure 5 also shows a table with indices of refraction for various materials. Index of Material Diamond Refraction Ice 1.31 Fluorite 1.43 T- 02 Sapphire Sapphire 1.77 ? Diamond 2.42 Titanium 2.90 Dioxide Figure 5 14. What is the incident angle 6, inside the diamond? a) 0, 24° b) 8, = 34° c) 8, x 44° d) 0, x 54° e) e, x 64° 15. What is the horizontal distance x travelled inside the sapphire? а) х~ 6.4 ст b) x = 7.2 cm c) x x 8.6 cm d) x x 9.3 cm e) x * 12.1 cm 16. Which of the following could be the material of the third layer? a) Ice only b) Fluorite only c) Either ice or fluorite d) Titanium dioxide only e) None of the above

Light that is initially travelling in a layer of diamond is incident on a layer of sapphire as shown in Figure 5. The sapphire layer has thickness T = 3 cm. The angle inside the sapphire is 6, = 50°. When the light reaches a third layer, it experiences total internal reflection. The material of the third layer is unknown. Figure 5 also shows a table with indices of refraction for various materials. Index of Material Diamond Refraction Ice 1.31 Fluorite 1.43 T- 02 Sapphire Sapphire 1.77 ? Diamond 2.42 Titanium 2.90 Dioxide Figure 5 14. What is the incident angle 6, inside the diamond? a) 0, 24° b) 8, = 34° c) 8, x 44° d) 0, x 54° e) e, x 64° 15. What is the horizontal distance x travelled inside the sapphire? а) х~ 6.4 ст b) x = 7.2 cm c) x x 8.6 cm d) x x 9.3 cm e) x * 12.1 cm 16. Which of the following could be the material of the third layer? a) Ice only b) Fluorite only c) Either ice or fluorite d) Titanium dioxide only e) None of the above