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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Textbook Question
Chapter 5, Problem 4TQ
Is it better to have a telescope with a high resolving power or a high magnification? Explain why.
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5)An astronomer is observing an image in a telescope that might be two objects, but it’s unclear.
a) If she has three filters: red, yellow, and blue, which color filter should she use? (_______)
b) If she only has one filter, but instead she can change the size of the aperture of the telescope, how should she change the aperture?(_______) (type in larger or smaller)
5. (i.) What is resolution?
(ii.) What must be true in order for two objects to be resolvable?
(iii.) Suppose a 5.0 m diameter telescope were constructed on the far side of the Moon. To prove that the viewing there would be excellent, what would be the separation between two objects that could just be resolved on Mars in 500. nm light? [Use the Mars-Moon distance of 80.5 million km.]
What CANOT be explained by ray optics?
the resolution of telescope.
image reversal in a mirror.
camera lens refraction.
X
the transmission of signals in
fiber optic.
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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- How far apart must two objects be on the moon to be resolvable by the 8.1-m-diameter Gemini North telescope at Mauna Kea, Hawaii, if only the diffraction effects of the telescope aperture limit the resolution? Assume 550 nm for the wavelength of light and 400,000 km for the distance to the moon.arrow_forwardWhy is it advantageous to use a large-diameter objective lens in a telescope? (a) It diffracts the light more effectively than smaller-diameter objective lenses. (b) It increases its magnification. (c) It enables you to see more objects in the field of view. (d) It reflects unwanted wavelengths. (e) It increases its resolution.arrow_forwardWhat is the minimum diameter mirror on a telescope that would allow you to see details as small as 5.00 km on the moon some 384,000 km away? Assume an average wavelength of 550 nm for the light received.arrow_forward
- If you build a telescope with a focal length of 1.3 m, what focal length does the eyepiece need to give a magnification of 100 times?arrow_forward11:55 phys.libretexts.org Submit Both the Keck Telescope and Hubble Space Telescope (HST) observe visible light. Given a typical visible light wavelength of 500 nm, and the diameters of 10 m for Keck and 2.4 m for Hubble, which telescope do you think would have better angular resolution? Based on the equation for angular resolution, what is the resolution of Keck at 500 nm? Of HST? How can we help VIEW Submit %Darrow_forwardThe telescope of a spy satellite is reputed to be able to resolve objects 9 cm apart from an altitude of 180 km above the surface of Earth. 1) What is the diameter, in meters, of the telescope’s aperture, if its resolution is limited only by diffraction effects? Take 550 nm for the wavelength of light.arrow_forward
- What is the field of view when a CCD detector of dimensions 15 mm x 15 mm is used with a telescope that has a diameter of 1 metre and a focal ratio f/10? Express your answer in arcseconds x arcseconds. Choose the answer below that best matches your answer. Select one: О а. 68 x 68 оb. 698 х 698 С. 125 х 125 O d. 243 x 243 е. 309 х 309arrow_forwardWhat is the limit of resolution for a telescope lens with a diameter of 120 cm when it observes a star at a distance of 4 light-years? Use the wavelength of l = 550 nm in your calculations.arrow_forwardCompare the angular resolving power of the following imaging instruments (details of the italicized instruments are to be covered later). Take the wavelength of light as 5 × 10-7 m. (a) the eye with an effective aperture of 0.5 cm (b) a pair of binoculars using a typical aperture of the front lenses (c) the Yerkes Observatory optical telescope, with a diameter of roughly 1.0 m (d) the Manchester radiotelescope, with a diameter of 76.2 m, using microwave radiation of wavelength 22 cm Oarrow_forward
- 5. A diffraction-limited telescope with a 7.6 cm aperture is aimed at target 12.5 km away. Assuming light of 580 nm wavelength and neglecting air turbulence, what size details can be resolved by the telescope? A) 8.2 cm B) 10.0 cm C) 11.3 cm D) 12.43 cm E) 12.88 cmarrow_forward(a) What is the angular separation of two stars if their images are barely resolved by the Thaw refracting telescope at the Allegheny Observatory in Pittsburgh? The lens diameter is 76 cm and its focal length is 14 m. Assume l = 550 nm. (b) Find the distance between these barely resolved stars if each of them is 10 light-years distant from Earth. (c) For the image of a single star in this telescope, find the diameter of the first dark ring in the diffraction pattern, as measured on a photographic plate placed at the focal plane of the telescope lens. Assume that the structure of the image is associated entirely with diffraction at the lens aperture and not with lens “errors.”arrow_forwardCalculate the limit of resolution of a telescope objective having a diameter of 200 cm, if it has to detect light of wavelength 500 nm coming from a star.. (a) 610 x 10⁹ rad -9 (b) 305 x 10⁹ rad ma (c) 457.5 x 109 rad (d) 152.5 x 10⁹ radarrow_forward
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