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 1QFR
What is light-gathering power? How does it affect the ability to see faint objects?
Expert Solution & Answer
To determine
The light-gathering power, and to check its effect on the ability to see faint objects.
Answer to Problem 1QFR
Light-gathering power is the capability of a telescope to accumulate a large amount of photons than the human eye. The greater the area of collecting of the telescope the brighter the object.
Explanation of Solution
When photons from any object strike a person’s retina he or she will be capable to see the object if the quantity of photons are large enough to trigger chemical reactions in nerve cells. The brightness of the object is dependent on the number of photons that enter his or her eye per second, and the number differs according to the size of each person’s eyes pupils.
Light-gathering power rely on the collecting area of the mirror. In case of telescopes the greater its collecting area the more the photons it collects. Thus, a telescope with a larger diameter lens will have greater light-gathering power. Since a larger telescope can produce a brighter image, this allows a person to see faint stars that are invisible in telescopes with smaller gathering area.
Therefor light-gathering power is the capability of a telescope to collect a large amount of photons than the human eye. Also greater the area of collecting the brighter the object.
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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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