What is the critical angle for total internal reflection for quartz in air? a. 3

Question

What is the critical angle for total internal reflection for quartz in air? a. 39.85 degree b. 42.83 degree c. 46.07 degree d. 44.55 degree e. 43.30 degree. f. 49.59 degree A ray of light inside a diamond escapes by striking the surface of the diamond (which is in air) at angle 5 degrees less than the critical angle for total internal reflection. What is the angle of refraction for the ray as it emerges from the diamond? a. 50.41 degree b. 59.61 degree c. 45.13 degree d. 53.54 degree e. 54.91 degree f. 44.19 degree Find the index of refraction for the material of the prism (in air) shown below a. 0.9610 b. 1.2860 c. 1.2030 d. 1.2820 e. 1.2080 f. 0.96670

Explanation / Answer

refractive index of quartz n1 = 1.458

7. refractive index of air n2 = 1

sinC = n2/n1  = 1/1.458

sinC = 0.6859

there fore critical angle C = sin-1(0.6859)

= 43.30

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