Light strikes a diamond (n = 2.42) at an angle of 60° relative to the normal to the surface. What is the angle of refraction?
a. 21°
b. 30°
c. 38°
d. 69°
e. 71°
a
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A(n) ____________ is a solar-system object that enters Earth's atmosphere and becomes very hot due to friction between the object and Earth's atmosphere and does not survive to reach the surface
a. asteroid b. meteor c. comet d. meteoroid e. planetesimal
Violet light with a wavelength of 430 nm falls on a sodium plate (W = 2.75 eV) and a potassium plate (W = 2.30 eV). Which of of the following statements is true?
A. Both plates emit electrons, but those emitted by the sodium plate have the larger kinetic energy. B. Both plates emit electrons, but those emitted by the potassium plate have the larger kinetic energy. C. Only the sodium plate emits electrons. D. Only the potassium plate emits electrons. E. Neither plate emits electrons.
For certain angles, TOTAL INTERNAL REFLECTION can occur when light tries to pass from one medium to another which has
A) a larger index of refraction. B) a smaller index of refraction. C) the same index of refraction. D) an index of refraction which is sin-1 (45°). E) an index of refraction which is sin-1 (n).
What is the visible surface of the Sun called?
a. Photosphere b. Atmosphere c. Stratosphere d. Glowing sphere