Universe: Stars And Galaxies
Universe: Stars And Galaxies
6th Edition
ISBN: 9781319115098
Author: Roger Freedman, Robert Geller, William J. Kaufmann
Publisher: W. H. Freeman
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Chapter 18, Problem 17Q
To determine

To explain:

Theprotostars are easily seen with an infrared telescope than with a visible light.

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If a contracting protostar is three times the radius of the Sun and has a temperature of only 3000 K , how luminous will it be relative to the Sun?
If a contracting protostar is 0.5 times as luminous as the Sun and has a temperature of only 1,500 K, how does its radius compare to that of the Sun?
If a contracting protostar is two times the radius of the Sun and has a temperature of only 1890 K, how luminous will it be relative to the Sun?
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