1. Telescope A's mirror has three times the diameter of telescope B's. How much greater is A's light-gathering power? A 3 times. B6 times C 8 times. D9 times E27 times.
2. A telescope's resolving power measures its ability to see Afainter sources. east. B more distant sources. Cfiner details in sources. Dlarger sources. Emore rapidly moving sources.
3. A ground-based telescope to observe x-rays would A be a powerful tool for studying abnormally cold stars or distant planets. B give astronomers the chance to study the insides of stars and planets. C be worthless because no astronomical objects emit x-rays. D be worthless because x-rays can not pass through the Earth's atmosphere. E be worthless because astronomers have not yet devised detectors for x-rays.
4. Astronomers use interferometers to A observe extremely dim sources. B measure the speed of remote objects. C etect radiation that otherwise cannot pass through our atmosphere. D enhance the resolving power (see fine details) in sources.. E measure accurately the composition of sources.
5. One way to increase the resolving power of a telescope is to A make its mirror bigger. B make its mirror smaller. C replace its mirror with a lens of the same diameter. D use a mirror made of gold. E observe objects using longer wavelengths..
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