21st Century Astronomy
6th Edition
ISBN: 9780393428063
Author: Kay
Publisher: NORTON
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Chapter 6.3, Problem 6.3CYU
To determine
The biggest disadvantage of using telescope in space.
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The Very Long Baseline Array (VLBA) is
a.
the highest resolution optical telescope ever built.
b.
located in Arecibo, Puerto Rico.
c.
a matched pair of 8-meter telescopes, one of which is in Chile and the other in Hawaii.
d.
an airborne infrared telescope.
e.
a set of radio telescopes linked together electronically to provide very high resolution.
Which of the following telescopes must be used above Earth’s atmosphere?
a.
an optical telescope
b.
the VLBI telescope
c.
an X-ray telescope
d.
a radio telescope
e.
none of the above
Which of the following is NOT a limitation associated with radio telescopes?
a.
a short focal length
b.
poor resolution
c.
low-intensity radiation
d.
interference
e.
none of the above
Chapter 6 Solutions
21st Century Astronomy
Ch. 6.1 - Prob. 6.1ACYUCh. 6.1 - Prob. 6.1BCYUCh. 6.2 - Prob. 6.2CYUCh. 6.3 - Prob. 6.3CYUCh. 6.4 - Prob. 6.4CYUCh. 6.5 - Prob. 6.5CYUCh. 6 - Prob. 1QPCh. 6 - Prob. 2QPCh. 6 - Prob. 3QPCh. 6 - Prob. 4QP
Ch. 6 - Prob. 5QPCh. 6 - Prob. 6QPCh. 6 - Prob. 7QPCh. 6 - Prob. 8QPCh. 6 - Prob. 9QPCh. 6 - Prob. 10QPCh. 6 - Prob. 11QPCh. 6 - Prob. 12QPCh. 6 - Prob. 13QPCh. 6 - Prob. 14QPCh. 6 - Prob. 15QPCh. 6 - Prob. 16QPCh. 6 - Prob. 17QPCh. 6 - Prob. 18QPCh. 6 - Prob. 19QPCh. 6 - Prob. 20QPCh. 6 - Prob. 21QPCh. 6 - Prob. 22QPCh. 6 - Prob. 23QPCh. 6 - Prob. 24QPCh. 6 - Prob. 25QPCh. 6 - Prob. 26QPCh. 6 - Prob. 27QPCh. 6 - Prob. 28QPCh. 6 - Prob. 29QPCh. 6 - Prob. 30QPCh. 6 - Prob. 31QPCh. 6 - Prob. 32QPCh. 6 - Prob. 33QPCh. 6 - Prob. 34QPCh. 6 - Prob. 35QPCh. 6 - Prob. 36QPCh. 6 - Prob. 37QPCh. 6 - Prob. 38QPCh. 6 - Prob. 39QPCh. 6 - Prob. 40QPCh. 6 - Prob. 41QPCh. 6 - Prob. 42QPCh. 6 - Prob. 43QPCh. 6 - Prob. 44QPCh. 6 - Prob. 45QP
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- Which of the following explain why far infrared astronomy must be done from high-flying aircraft? a. Far infrared radiation is absorbed low in Earth’s atmosphere. b. Far infrared photons are quite energetic. c. Far infrared telescopes are not very heavy. d. Far infrared sources are very bright. e. None of the above are correct.arrow_forwardWhich of the following describes interferometry? a. It is used to improve resolving power. b. It decreases the chromatic aberration of a telescope. c. It works only for large X-ray and ultraviolet telescopes. d. It requires that radio telescopes be within a few hundred feet of each other. e. None of the above statements are true.arrow_forwardWhy do radar satellites typically use a sun-synchronous, dawn-dusk orbit? A. To optimize the collection geometry for higher resolution images. B. To maintain a constant solar zenith angle on the targets. C. To maximize the access time for ground targets. D. To maximize the available power to the solar panels.arrow_forward
- Of the following observing devices, the one that is designed to make observations at visible wavelengths is a. Chandra. b. Sofia. c. the Hubble Space Telescope. d. the Spitzer Space Telescope e. the Compton Space telescope.arrow_forwardThe Chandra Observatory orbiting the Earth is designed to: b. Replace the Hubble Telescope, with a much larger mirror for collecting visable light c. Search for rapidlt changing radio signals d. Examine sources of cosmic raysarrow_forwardWhich of the following is NOT a characteristic of the next generation of planned telescopes? Answers: A. multiple focus points B. extreme size C. segmented mirrors D. adaptive optics E. multiple wavebandsarrow_forward
- Radio telescopes have poor resolving power because a. their diameters are so large. b. the energy they receive is not electromagnetic radiation. c. radio waves have long wavelengths. d. a and b are true. e. none of the above are true.arrow_forward2. The nearest star to earth is the Proxima Centauri. It is approximately 4.2 lightyears away from our planet. a) Express this distance in km and in the astronomical unit. b) Calculate the time that it will take for this star's light to reach earth. 3. Find the weights of gelatin and butter contained in a cubic box with a side dimension of 0.03 cm. Gelatin has a density of 79 Ib/ft² while butter has a density of 53 lb/ft’.arrow_forwardWhich of the following describes how a refracting telescope works? A. It uses two convex lenses to gather and focus light from distant objects B. It uses only mirrors to collect and focus light from distant objects C. It uses both mirrors and lenses to collect and focus light from distant objectsarrow_forward
- The Moon has no sustained atmosphere. What advantages would you have if you built an observatory on the lunar surface? (Select all that apply.) a. On Earth, large mirrors in telescopes can sag under their own weight. Without an atmosphere to apply pressure, mirrors on the Moon would not sag. b. We could observe during the day. Without an atmosphere, sunlight is not scattered and the sky remains dark. c. We could observe continuously, because there would never be any clouds. d. The Moon is closer to many stars than the Earth, and lunar-based telescopes would produce images with more detail based on this closer proximity. e. There is no atmosphere to absorb or scatter radiation, so all wavelengths of light could be observed with lunar-based telescopes, from radio waves to gamma rays. f. Distortion of mirrors due to temperature shifts would no longer be an issue, without an atmosphere to retain the heat from sunlight. g. Without atmospheric turbulence, there would be no…arrow_forwardImagine that you are the head of a funding agency that can afford to build only one telescope. Which of the four proposed telescopes below would be best to support? O A. a radio telescope in orbit above the Earth B. A gamma ray telescope in orbit above the Earth O C. An x-ray telescope located on a mountain in Peru D. An ultraviolet telescope located in the Mojave desertarrow_forwardWhat is the ratio of the light-gathering power of a 10-meter telescope to that of a 1‑meter telescope? a. 10 to 1 b. 1 to 10 c. 100 to 1 d. 1 to 100 e. 3.2 to 1arrow_forward
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