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 4QFR
To determine
Affecting factor of the resolution of the telescope by the size of a telescope’s mirror or lens
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The large space telescope that has been placed into an Earth orbit has an aperture diameter of 1.4
meters. What angular resolution will this telescope achieve for visible light of wavelength 2 = 6.5 x
10-7 m? Write your answer in "seconds of arc".
What 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.
You are using a telescope is to resolve two distant stars as well as possible.
Which of the following modifications will increase the resolution of the telescope?
Question 8 options:
Use a filter to filter out all but the red light.
Use a filter to filter out all but the blue light.
Use a lens of smaller diameter
Use a lens of larger diameter
None of these modifications will impact the resolution of the telescope.
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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- 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_forwardThe angular resolution of a radio telescope is to be 0.100 when the incident waves have a wavelength of 3.00 mm. What minimum diameter is required for the telescopes receiving dish?arrow_forwardHow much more light can be gathered by a telescope that is 8 m in diameter than by your fully dark-adapted eye at 7 mm?arrow_forward
- The 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_forwardThe primary mirror of a telescope is 2.4 m in diameter. At what altitude will you need to pilot the telescope in order to resolve things on a 3.0 cm scale?arrow_forwardA certain telescope has a 10' × 10' field of view that is re- corded using a CCD chip having 2048 x 2048 pixels. What angle on the sky corresponds to 1 pixel? What would be the di- ameter of a typical seeing disk (1" radius), in pixels?arrow_forward
- (a) How far apart must two objects be on the moon to be resolved by the human eye? Take the diameter of the pupil of the eye to be 6 mm, the wavelength of the light to be 500 nm, and the distance from the earth to the moon to be 380 000 km. Number Units (b) How far apart must the objects be on the moon be to be resolved by a telescope that has a mirror diameter of 6 m? Number Unitsarrow_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 Giant Metrewave Radio Telescope (GMRT) near Pune has several antennas spread over a region of size about 10 km. Make an estimate of the resolution (in arcseconds) that this telescope is expected to have. How large will an optical telescope have to be to achieve a similar resolution in visible light?arrow_forward
- A Newtonian telescope has a mirror diameter of 300 mm and a focal length of 1500mm. The tube has an external diameter of 330mm and the focal plane is 40mm outside the tube.arrow_forwardWhy does primary or objective lens of a refracting telescope should have a longer focal length?arrow_forwardA charged-couple device (CCD) detector ismounted at the focus of an f/7 reflecting telescope with a D= 50 cm mirror. The CCD chip contains 1024×1024 pixels, with each square pixel being 10μm on a side. What is the area (in square arcminutes) of the sky that is imaged on the entire chip?arrow_forward
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