We have seen that two monochromatic light waves can interfere constructively or destructively, depending on their phase difference. One consequence of this phenomena is
A) the colors you see when white light is reflected from a soap bubble.
B) a rainbow.
C) the appearance of a mirage in the desert.
D) the way in which polarized sunglasses work.
E) the formation of an image by a converging lens, such as the lens in your eye.
A
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The support force on a 10-N book that rests on a horizontal surface is
A) less than 10 N. B) 10 N. C) greater than 10 N. D) dependent on whether the book lies flat or stands upright.
What did Galileo discover through his telescope when he looked at Jupiter, and how did it refute the Ptolemaic model?
What will be an ideal response?
When an object is effectively isolated from external torques, like an ice skater twirling on the tip of one skate, the angular momentum of the object
a. can be increased by shifting mass out away from the axis of rotation. b. can be decreased by shifting mass out away from the axis of rotation. c. can be increased by shifting mass in toward the axis of rotation. d. can be decreased by shifting mass in toward the axis of rotation. e. cannot be changed except by friction at the point of contact.
A joule/meter (J/m) is a unit of
a. force. b. work. c. energy. d. power.