The deviation of a lens from its ideal behavior is referred to as
A)
spherical aberration.
B)
chromatic aberration.
C)
an aberration.
D)
achromatic aberration.
E)
None of the other choices is correct.
C
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Using the ideas discussed in your text, in what sense are we "star stuff"?
A) The overall chemical composition of our bodies is about the same as that of stars. B) Movie stars and other people are all made of the same stuff, so we all have the potential to be famous. C) Nearly every atom from which we are made was once inside of a star. D) We could not survive without light from our star, the Sun.
What is spacetime?
A) It's the inseparable combination of space and time. B) It's time that we measure when traveling in space. C) It's a graph with four axes. D) It's a way of viewing books at different angles.
Objects in the Kuiper belt:
A) are in random orbits at all inclinations to the ecliptic. B) lie beyond the orbit of Neptune, and close to the ecliptic. C) are the sources of long-period comets. D) are dense, like the iron meteorites. E) lie beyond the orbit of Neptune and perpendicular to the ecliptic.
Two stars of masses M and 6M are separated by a distance D. Determine the distance (measured from M) to a point at which the net gravitational force on a third mass would be zero
a. 0.41 D b. 0.33 D c. 0.37 D d. 0.29 D e. 0.14 D