Loose Leaf For The Physical Universe
16th Edition
ISBN: 9781259665004
Author: Konrad B Krauskopf, Arthur Beiser
Publisher: McGraw-Hill Education
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Chapter 19, Problem 14MC
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What a radio telescope is.
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Outline the invention of a telescope. Describe the working of a telescope.
Theory
One significant telescope property is magnification (Mag). Magnification makes a small object appear larger. If Mag = 30X, the image is 30 times the size of the object.
Related to Magnification is Field of View (FOV). FOV measures the fraction of the sky that can be viewed by the instrument. Generally, the higher the Mag, the lower the FOV.
Light Gathering Power (LGP) is a measure of the light collection efficiency of the telescope. The higher the LGP, the brighter the image. LGP varies with the area (or diameter squared) of the aperture.
Resolution (Res) measures the ability of the telescope to bring out fine detail. Res varies with aperture diameter. Also, Res is better for higher frequency (blue) light than for lower frequency (red light).
Notice in Figure 9-1 for the Refractor that Objective focal length (fobj) and eyepiece focal length (feye) are labeled. The lens separation in this type of Refractor is feye + fobj. The magnification is fobj / feye
Questions
1. A…
Theory
One significant telescope property is magnification (Mag). Magnification makes a small object appear larger. If Mag = 30X, the image is 30 times the size of the object.
Related to Magnification is Field of View (FOV). FOV measures the fraction of the sky that can be viewed by the instrument. Generally, the higher the Mag, the lower the FOV.
Light Gathering Power (LGP) is a measure of the light collection efficiency of the telescope. The higher the LGP, the brighter the image. LGP varies with the area (or diameter squared) of the aperture.
Resolution (Res) measures the ability of the telescope to bring out fine detail. Res varies with aperture diameter. Also, Res is better for higher frequency (blue) light than for lower frequency (red light).
Notice in Figure 9-1 for the Refractor that Objective focal length (fobj) and eyepiece focal length (feye) are labeled. The lens separation in this type of Refractor is feye + fobj. The magnification is fobj / feye.
Questions.
(3.…
Chapter 19 Solutions
Loose Leaf For The Physical Universe
Ch. 19 - Prob. 1MCCh. 19 - Prob. 2MCCh. 19 - Prob. 3MCCh. 19 - Prob. 4MCCh. 19 - Prob. 5MCCh. 19 - Prob. 6MCCh. 19 - Prob. 7MCCh. 19 - Prob. 8MCCh. 19 - Prob. 9MCCh. 19 - Prob. 10MC
Ch. 19 - Prob. 11MCCh. 19 - Prob. 12MCCh. 19 - Prob. 13MCCh. 19 - Prob. 14MCCh. 19 - Prob. 15MCCh. 19 - Prob. 16MCCh. 19 - Prob. 17MCCh. 19 - Prob. 18MCCh. 19 - Prob. 19MCCh. 19 - Prob. 20MCCh. 19 - Prob. 21MCCh. 19 - Prob. 22MCCh. 19 - Prob. 23MCCh. 19 - Prob. 24MCCh. 19 - Prob. 25MCCh. 19 - Current ideas suggest that what is responsible for...Ch. 19 - Prob. 27MCCh. 19 - Prob. 28MCCh. 19 - The expansion of the universe apparently a. has...Ch. 19 - Prob. 30MCCh. 19 - The elements heavier than hydrogen and helium of...Ch. 19 - Prob. 32MCCh. 19 - Prob. 33MCCh. 19 - Prob. 34MCCh. 19 - Prob. 35MCCh. 19 - Prob. 36MCCh. 19 - Prob. 37MCCh. 19 - Prob. 38MCCh. 19 - Prob. 39MCCh. 19 - Prob. 40MCCh. 19 - It is likely that the planets, satellites, and...Ch. 19 - Prob. 42MCCh. 19 - Prob. 43MCCh. 19 - Prob. 1ECh. 19 - Prob. 2ECh. 19 - Prob. 3ECh. 19 - The earth undergoes four major motions through...Ch. 19 - Prob. 5ECh. 19 - Prob. 6ECh. 19 - Prob. 7ECh. 19 - Prob. 8ECh. 19 - Prob. 9ECh. 19 - Prob. 10ECh. 19 - Prob. 11ECh. 19 - Prob. 12ECh. 19 - Prob. 13ECh. 19 - Prob. 14ECh. 19 - Prob. 15ECh. 19 - Prob. 16ECh. 19 - Prob. 17ECh. 19 - Prob. 18ECh. 19 - Prob. 19ECh. 19 - Prob. 20ECh. 19 - Prob. 21ECh. 19 - There is no day-night difference in cosmic-ray...Ch. 19 - Prob. 23ECh. 19 - Prob. 24ECh. 19 - Prob. 25ECh. 19 - Prob. 26ECh. 19 - Prob. 27ECh. 19 - Prob. 28ECh. 19 - Prob. 29ECh. 19 - Prob. 30ECh. 19 - What is the observational evidence in favor of the...Ch. 19 - Prob. 32ECh. 19 - Prob. 33ECh. 19 - To what event in the history of the universe can...Ch. 19 - Prob. 35ECh. 19 - Prob. 36ECh. 19 - Prob. 37ECh. 19 - Prob. 38ECh. 19 - Prob. 39ECh. 19 - Prob. 40ECh. 19 - Prob. 41ECh. 19 - Prob. 42ECh. 19 - Prob. 43ECh. 19 - Prob. 44ECh. 19 - Prob. 45E
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- The sun is 150,000,000 kmkm from earth; its diameter is 1,400,000 kmkm. For a science project on solar power, a student uses a 24-cmcm-diameter converging mirror with a focal length of 51 cmcm to focus sunlight onto an object. This casts an image of the sun on the object. For the most intense heat, the image of the sun should be in focus. What is the intensity of sunlight in the projected image? Assume that all of the light captured by the mirror is focused into the image. Express your answer with the appropriate units.arrow_forwardTelescope A has a 5 in. diameter whereas Telescope B has a 12 cm diameter. Which telescope gathers more light? By how much? Bright telescope = dim telescopearrow_forwardThe X-ray image in Figure UN 5-5 shows the remains of an exploded star. Explain why images recorded by telescopes in space are often displayed in representational (“false”) color rather than in the “colors” (wavelengths) received by the telescope.arrow_forward
- What is meant by “reflecting” and “refracting” telescopes?arrow_forwardHow long does it take light to cross the diameter of our Milky Way Galaxy?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_forward
- Name the two spectral windows through which electromagnetic radiation easily reaches the surface of Earth and describe the largest-aperture telescope currently in use for each window.arrow_forwardThe light-gathering power of a telescope is directly related to the area of the telescope's primary mirror. A mirror with four times the diameter of another mirror collects how many times more light as the smaller mirror does in the same amount of time?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
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