A light ray is incident on the surface of water (n = 1.33) at an angle of 60° relative to the normal to the surface. The angle of the reflected wave is
A. 80°.
B. 40°.
C. 20°.
D. 60°.
E. 30°.
Answer: D
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Force on a Moving Charge: An electron is moving to the right, as shown in the figure. Suddenly it encounters uniform magnetic field pointing out of the page. Which one of the three paths shown will it follow in the field?
A. path a B. path b C. path c
Figure Q6.15 below shows a sequence of Stern–Gerlach devices. By analogy to the cases discussed in the chapter, what do you think are the probabilities that an electron entering the last device will come out of that device’s plus and minus channels, respectively? 
A. 1 and 0, respectively (AA if reversed, i.e., 0 and 1)
B. 0.933 and 0.067, respectively (BB if reversed)
C. 
, respectively (CC if reversed)
D. 
for both channels
E. Some other probabilities (specify)
A record is dropped vertically onto a freely rotating (undriven) turntable. Frictional forces act to bring the record and turntable to a common angular speed
If the rotational inertia of the record is 0.54 times that of the turntable, what percentage of the initial kinetic energy is lost? A) 35% B) 18% C) 46% D) 60%
The component in CFCs that is responsible for destroying ozone is
a. chlorine. b. oxygen. c. carbon. d. none of the above.