Foundations of Astronomy (MindTap Course List)
14th Edition
ISBN: 9781337399920
Author: Michael A. Seeds, Dana Backman
Publisher: Cengage Learning
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Chapter 6, Problem 7RQ
To determine
The nocturnal animals have large pupils in their eyes explain it and how it is related to the astronomical telescopes work.
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Chapter 6 Solutions
Foundations of Astronomy (MindTap Course List)
Ch. 6 - Does light include radio waves? Explain your...Ch. 6 - Prob. 2RQCh. 6 - Prob. 3RQCh. 6 - Prob. 4RQCh. 6 - Does red light have a higher or lower energy than...Ch. 6 - Prob. 6RQCh. 6 - Prob. 7RQCh. 6 - Prob. 8RQCh. 6 - Prob. 9RQCh. 6 - Prob. 10RQ
Ch. 6 - Prob. 11RQCh. 6 - Prob. 12RQCh. 6 - Prob. 13RQCh. 6 - Prob. 14RQCh. 6 - Prob. 15RQCh. 6 - Prob. 16RQCh. 6 - Prob. 17RQCh. 6 - Prob. 18RQCh. 6 - Prob. 19RQCh. 6 - What is the role of prisms and gratings in...Ch. 6 - Prob. 21RQCh. 6 - Prob. 22RQCh. 6 - Prob. 23RQCh. 6 - Prob. 24RQCh. 6 - Plastic bags have a thickness about 0.001 mm. How...Ch. 6 - What is the wavelength of radio waves transmitted...Ch. 6 - What is the frequency and wavelength of an FM...Ch. 6 - Prob. 4PCh. 6 - Prob. 5PCh. 6 - Prob. 6PCh. 6 - Prob. 7PCh. 6 - Prob. 8PCh. 6 - In general, does a telescope resolve a close...Ch. 6 - Prob. 10PCh. 6 - Prob. 11PCh. 6 - Prob. 12PCh. 6 - Prob. 13PCh. 6 - Prob. 14PCh. 6 - Prob. 15PCh. 6 - Prob. 1SOPCh. 6 - Prob. 2SOPCh. 6 - Prob. 2LTLCh. 6 - Prob. 3LTLCh. 6 - Did the magnification, resolving, or...Ch. 6 - Explain what is meant by intensity in the...Ch. 6 - Prob. 6LTLCh. 6 - The star images in this photo are tiny disks, but...Ch. 6 - Prob. 8LTL
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- Many decades ago, the astronomers on the staff of Mount Wilson and Palomar Observatories each received about 60 nights per year for their observing programs. Today, an astronomer feels fortunate to get 10 nights per year on a large telescope. Can you suggest some reasons for this change?arrow_forwardPeople are often bothered when they discover that reflecting telescopes have a second mirror in the middle to bring the light out to an accessible focus where big instruments can be mounted. “Don’t you lose light?” people ask. Well, yes, you do, but there is no better alternative. You can estimate how much light is lost by such an arrangement. The primary mirror (the one at the bottom in Figure 6.6) of the Gemini North telescope is 8 m in diameter. The secondary mirror at the top is about 1 m in diameter. Use the formula for the area of a circle to estimate what fraction of the light is blocked by the secondary mirror. Figure 6.6 Focus Arrangements for Reflecting Telescopes. Reflecting telescopes have different options for where the light is brought to a focus. With prime focus, light is detected where it comes to a focus after reflecting from the primary mirror. With Newtonian focus, light is reflected by a small secondary mirror off to one side, where it can be detected (see also Figure 6.5). Most large professional telescopes have a Cassegrain focus in which light is reflected by the secondary mirror down through a hole in the primary mirror to an observing station below the telescope.arrow_forwardIn broad daylight, the size of your pupil is typically 3 mm. In dark situations, it expands to about 7 mm. How much more light can it gather?arrow_forward
- What kind of visible-light and infrared telescopes on the ground are astronomers planning for the future? Why are they building them on the ground and not in space?arrow_forwardWhat was the problem with the Hubble Space Telescope and how was it solved?arrow_forwardWhat is the area, in square meters, of a 10-m telescope?arrow_forward
- Telescopes can now be operated remotely from a warm room, but until about 25 years ago, astronomers worked at the telescope to guide it so that it remained pointed in exactly the right place. In a large telescope, like the Palomar 200-inch telescope, astronomers sat in a cage at the top of the telescope, where the secondary mirror is located, as shown in Figure 6.6. Assume for the purpose of your calculation that the diameter of this cage was 40 inches. What fraction of the light is blocked? Figure 6.6 Focus Arrangements for Reflecting Telescopes. Reflecting telescopes have different options for where the light is brought to a focus. With prime focus, light is detected where it comes to a focus after reflecting from the primary mirror. With Newtonian focus, light is reflected by a small secondary mirror off to one side, where it can be detected (see also Figure 6.5). Most large professional telescopes have a Cassegrain focus in which light is reflected by the secondary mirror down through a hole in the primary mirror to an observing station below the telescope.arrow_forwardWhat is the area of an 23 meter telescope, consider the area of a circlearrow_forwardA certain telescope has a 10'x10' field of view that is recorded using a CCD chip having 2048x2048 pixels. What angle on the sky responds to 1 pixel? What would be the diameter in pixels of a typical seeing disk? (1" radius)arrow_forward
- What are the three basic components of a modern astronomical instrument? Describe each in one to two sentences. (Select all that apply.) a magnifier, which increases the size of the image a motor, which allows the telescope to track sorces as they move a detector, which senses and records the radiation an eyepiece, where an astronomer can view the image created a telescope, which collects radiation a device which sorts radiation by wavelength Karrow_forward(It's actually astronomy) What if you had to scout for a site to build a new ground-based, optical telescope. What characteristics would an excellent site possess? Name at least two.arrow_forwardWhich of these is NOT one of the largest optical telescopes in the world? Answers: A. Southern African Large Telescope B. Hobby Eberly Telescope C. Yerkes Telescope D. Keck I Telescope E. Hale Telescopearrow_forward
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