21st Century Astronomy And Learning Astronomy By Doing Astronomy (fifth Edition)
5th Edition
ISBN: 9780393613360
Author: Laura Kay, Ana Larson, Stacy Palen, George Blumenthal
Publisher: W. W. Norton & Company
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Question
Chapter 13, Problem 1QP
To determine
The correct statement
Expert Solution & Answer
Answer to Problem 1QP
Option (b)
Explanation of Solution
Write the equation for the brightness of a star.
Here,
The distance of both the star A and star B is same from the earth. Hence, the luminosity is directly proportional to the brightness. When the brightness of the star A is halved, its luminosity will also become halved. As a result, the star B is now twice as bright as star B.
Conclusion:
Both star A and star B are nearly at same distance from the earth. The brightness of star A being halved does not have any influence on its distance from earth. Therefore option (a) is incorrect.
When the brightness of the star A is halved, its luminosity will also become. As a result, the star B is now twice as bright as star B. Therefore, option (b) is correct.
When the brightness of the star A is halved, its luminosity will also become. As a result, the star B is now twice as bright as star B and does not do anything with the hotness. Therefore, option (c) is incorrect.
The brightness of star A being halved does not anything to do with the size of the star A or star B. Therefore, option (d) is incorrect.
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Chapter 13 Solutions
21st Century Astronomy And Learning Astronomy By Doing Astronomy (fifth Edition)
Ch. 13.1 - Prob. 13.1CYUCh. 13.2 - Prob. 13.2CYUCh. 13.3 - Prob. 13.3CYUCh. 13.4 - Prob. 13.4CYUCh. 13 - Prob. 1QPCh. 13 - Prob. 2QPCh. 13 - Prob. 3QPCh. 13 - Prob. 4QPCh. 13 - Prob. 5QPCh. 13 - Prob. 6QP
Ch. 13 - Prob. 7QPCh. 13 - Prob. 8QPCh. 13 - Prob. 9QPCh. 13 - Prob. 10QPCh. 13 - Prob. 11QPCh. 13 - Prob. 12QPCh. 13 - Prob. 13QPCh. 13 - Prob. 14QPCh. 13 - Prob. 15QPCh. 13 - Prob. 16QPCh. 13 - Prob. 17QPCh. 13 - Prob. 18QPCh. 13 - Prob. 19QPCh. 13 - Prob. 20QPCh. 13 - Prob. 21QPCh. 13 - Prob. 22QPCh. 13 - Prob. 23QPCh. 13 - Prob. 24QPCh. 13 - Prob. 25QPCh. 13 - Prob. 26QPCh. 13 - Prob. 27QPCh. 13 - Prob. 28QPCh. 13 - Prob. 29QPCh. 13 - Prob. 30QPCh. 13 - Prob. 31QPCh. 13 - Prob. 32QPCh. 13 - Prob. 33QPCh. 13 - Prob. 34QPCh. 13 - Prob. 35QPCh. 13 - Prob. 36QPCh. 13 - Prob. 37QPCh. 13 - Prob. 38QPCh. 13 - Prob. 39QPCh. 13 - Prob. 40QPCh. 13 - Prob. 41QPCh. 13 - Prob. 42QPCh. 13 - Prob. 43QPCh. 13 - Prob. 44QPCh. 13 - Prob. 45QP
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