A person gazes at a very distant light source. If she now holds up two fingers, with a very small gap between them, and looks at the light source, she will see
A) a series of bright spots.
B) the same thing as without the fingers, but dimmer.
C) a hazy band of light varying from red at one side to blue or violet at the other.
D) a sequence of closely spaced bright lines.
D
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If the lens in a person's eye is too highly curved, this person is suffering from
A) farsightedness. B) spherical aberration. C) astigmatism. D) chromatic aberration. E) nearsightedness.
Which galaxy do you come from?
A: The Andromeda Galaxy. B: The Milky Way Galaxy. C: The Virgo Galaxy. D: The Antenna Galaxy. E: The Whirlpool Galaxy.
A lepton interacts via the strong interaction
a. True b. False Indicate whether the statement is true or false
A ball is thrown straight up with a speed of 30 m/s
(a.) How long does it take the ball to reach the maximum height? (b.) What is the maximum height reached by the ball? (c.) What is its speed after 4.2 s?