Loose Leaf For Explorations: Introduction To Astronomy
9th Edition
ISBN: 9781260432145
Author: Thomas T Arny, Stephen E Schneider Professor
Publisher: McGraw-Hill Education
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Chapter 5, Problem 5TY
To determine
The advantages of CCDs over photographic films.
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Chapter 5 Solutions
Loose Leaf For Explorations: Introduction To Astronomy
Ch. 5 - What is light-gathering power? How does it affect...Ch. 5 - Prob. 2QFRCh. 5 - Prob. 3QFRCh. 5 - Prob. 4QFRCh. 5 - What is the purpose of an interferometer?Ch. 5 - Prob. 6QFRCh. 5 - Why do astronomers put X ray observatories in...Ch. 5 - Prob. 8QFRCh. 5 - Prob. 9QFRCh. 5 - Prob. 10QFR
Ch. 5 - Apart from magnification, how do binoculars help...Ch. 5 - Prob. 2TQCh. 5 - Prob. 3TQCh. 5 - Is it better to have a telescope with a high...Ch. 5 - Prob. 5TQCh. 5 - Prob. 6TQCh. 5 - Prob. 7TQCh. 5 - Prob. 8TQCh. 5 - Prob. 1PCh. 5 - Estimate your eyes resolving power by drawing two...Ch. 5 - Can the unaided human eye resolve a crater on the...Ch. 5 - Prob. 4PCh. 5 - Prob. 5PCh. 5 - Prob. 6PCh. 5 - Prob. 7PCh. 5 - Prob. 1TYCh. 5 - Prob. 2TYCh. 5 - Prob. 3TYCh. 5 - Prob. 4TYCh. 5 - Prob. 5TYCh. 5 - Prob. 6TYCh. 5 - Prob. 7TYCh. 5 - Prob. 8TYCh. 5 - Prob. 9TY
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- Use diagrams to describe how the following types of telescope collect light from a single point- source at infinity, and form a focused image in the focal plane: (i) refractor (ii) Newtonian reflector (iii) catadioptric telescope. A telescope with focal ratio f/10 and diameter D = 0.5 m has a CCD detector placed at its focal plane. The CCD chip has dimensions 3 × 3 cm2 . Determine the size of the field of view that can be imaged on the CCD detector in units of arcminutes × arcminutes, and state whether or not an image of the full moon can be captured. Assume the angular diameter of the full moon is 30 arcminutes.arrow_forwardThe _____________________ of a telescope is a measure of its ability to show fine detail and depends on the diameter of the objective. a. light-gathering power b. focal length c. magnifying power d. resolving power e. spherical aberrationarrow_forwardWhat is the magnification of an astronomical telescope whose objective lens has a focal length of 78 cm and whose eyepiece has a focal length of 2.8 cm? The telescope is set so the image of the eyepiece is at infinity (so the viewer’s eye is “relaxed”). What is the overall length of the telescope? Sketch the situation, defining all your variables Please sketch it, this is most important.arrow_forward
- People 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_forwardOne important goal of astronomers is to have a telescope in space that can resolve planets like the earth orbiting other stars. If a planet orbits its star at a distance of 1.5 * 1011 m (the radius of the earth’s orbit around the sun) and the telescope has a mirror of diameter 8.0 m, how far from the telescope could the star and its planet be if the wavelength used was (a) 690 nm and (b) 1400 nm? Use the Rayleigh criterion and give your answers in light-years (1 ly = 9.46 * 1015 m).arrow_forwardIf a telescope has 2 converging lens, with an eyepiece that has a focal length of 3cm, and the object having a focal length of 90cm, what would be the total magnification that the telescope has?arrow_forward
- What are the advantages of using optical instruments in our daily activities? Share your own experiences.arrow_forwardTheory 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…arrow_forwardTheory 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.…arrow_forward
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