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

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

Astronomy

1st Edition

ISBN:9781938168284

Author:Andrew Fraknoi; David Morrison; Sidney C. Wolff

Publisher:Andrew Fraknoi; David Morrison; Sidney C. Wolff

Chapter6: Astronomical Instruments

Section: Chapter Questions

Problem 21E: The largest observatory complex in the world is on Mauna Kea, the tallest mountain on Earth. What...

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Imagine 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 desert
The most important function of an astronomical telescope is to: a. collect as much light as possible and bring it into focus c. enhance the violet colors of an object, which our eyes have trouble seeing d. bring distant objects closer by pulling on the light
. "Using Physics to Study Astronomical Bodies" From your basic understanding of optics (lenses and mirrors) to the more detailed structure of atoms and molecules, and physical optics, describe how astronomy is able to obtain such detailed information from such a large distance.
Quite often advertisements appear for telescopes that extol their magnifying power. a) Is this a good criterion for evaluating telescopes? Explain your answer. b) What would be a better criterion for evaluating telescopes? Explain your answer.
Which 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 wavebands
A new ground-based, optical telescope would need you to choose a location. What are the qualities of a great website? Two is a good start.
The largest observatory complex in the world is on Mauna Kea, the tallest mountain on Earth. What are some factors astronomers consider when selecting an observatory site? Don’t forget practical ones. Should astronomers, for example, consider building an observatory on Denali (Mount McKinley) or Mount Everest?
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.
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
the telephone poles. 2. Figure 10.48 shows a cross-section of Joey's toy periscope. What will Joey see when he looks in the periscope? Explain, using the laws of reflec- tion (trace the periscope). What would be a bet- ter way to position the mirror in the telescope? onil Inmnc emon Open here. o5noradwod 519hO the ing ding the wall 1.The dire crson st Look in here. Figure 10.48 Joey's periscope. 3. Figure 10.49 shows a sketch of a room that has a pair of perpendicular mirrors, drawn from the fa fly on the ceiling. A person mirror
which types of telescopes must be placed and operated in space well above earth's atmosphere ? (select all that apply) a. gamma ray telescope b. x ray telescope c.UV telescope d. visible light telescope e.infrared telescope f. radio telescope
What is the field of view when a CCD The telescope and CCD detector described in question 2 are used to detector of dimensions 15 mm x 15 mm is observe a distant star cluster. The used with a telescope that has a diameter detector has 2000 x 2000 pixels. What is of 1 metre and a focal ratio f/10? Express the minimum angular separation between two stars in the cluster that can your answer in arcseconds x arcseconds. just be resolved with this observing Choose the answer below that best system if we ignore the effects of diffraction and the Earth's atmosphere? matches your answer. Assume the two stars are resolved if they are able to fall on the centres of two Select one: neighbouring pixels. Choose the answer below that best matches your answer. О а. 68 x 68 O b. 698 x 698 Select one: 125 x 125 2.5" а. Ос. b. 0.07" O d. 243 x 243 О с 0.15" O e. 309 х 309 d. 1.3" е. 0.80"