HW#15: pg. 130-131 Rev 7 – 9; CST 7 – 9
Rev 7 – 9
7. How do astronomers use adaptive optics to improve the resolution of telescopes?
8. Why do radio telescopes have to be very large?
9. Which astronomical objects are best studied with radio techniques?
CST 7 – 9
7. When multiple radio telescopes are used for interferometry, resolving power is most improved by increasing (a) the distance between telescopes; (b) the number of telescopes in a given area; (c) the diameter of each telescope; (d) the electrical power supplied to each telescope.
8. The Spitzer Space Telescope (SST) is stationed far from Earth because (a) this increases the telescope's field of view; (b) the telescope is sensitive to electromagnetic interference from terrestrial radio stations; (c) doing so avoids the obscuring effects of Earth's atmosphere; (d) Earth is a heat source and the telescope must be kept very cool.
9. The best way to study warm (1000 K) young stars forming behind an interstellar dust cloud would be to use (a) X-rays; (b) infrared light; (c) ultraviolet light; (d) blue light.