# Practice Quiz 1 - n = 1.56) at an angle of 60°, what is...

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Practice Quiz 1 1. The photoelectric effect was discovered by: a. Maxwell. b. Einstein. c . Hertz. d. Planck. 2. A ray of light strikes a thick sheet of glass ( n = 1.5) at an angle of 25° with the normal. Find the angle of the ray reflected off the glass surface with respect to the normal. a. 56° b. 46° c. 39° d. 25° 3. A beam of light in air is incident on the surface of a rectangular block of clear plastic ( n = 1.49). If the velocity of the beam before it enters the plastic is 3.00 × 10 8 m/s, what is its velocity inside the block? a. 3.00 × 10 8 m/s b. 1.93 × 10 8 m/s c. 2.01 × 10 8 m/s d. 1.35 × 10 8 m/s 4. If the speed of light through an unknown liquid is measured at 1.80 × 10 8 m/s, what is the index of refraction of this liquid? ( c = 3.00 × 10 8 m/s) a. 1.80 b. 1.67 c. 1.20 d. 0.600 5. If light from a 560-nm monochromatic source in air is incident upon the surface of fused quartz (
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Unformatted text preview: n = 1.56) at an angle of 60°, what is the wavelength of the ray refracted within the quartz? a. 192 nm b. 359 nm c. 560 nm d. 874 nm 6. A ray of light travels across a liquid-to-glass interface. If the indices of refraction for the liquid and glass are, respectively, 1.75 and 1.52, what is the critical angle at this interface? a. 30.0° b. 52.2° c. 60.3° d. Critical angle does not exist. 7. Diamond has an index of refraction of 2.419. What is the critical angle for internal reflection inside a diamond that is in air? a. 24.4° b. 48.8° c. 155° d. 131° 8. When light passing through a prism undergoes dispersion, the effect is a result of: a. different wavelengths traveling at different speeds. b. different wavelengths having different indices of refraction. c. different wavelengths refracting differently. d. All of the above....
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## This note was uploaded on 05/13/2010 for the course PHYSICS 103 taught by Professor K during the Spring '10 term at California State University Los Angeles .

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