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Get Full Access to University Physics - 13 Edition - Chapter 17 - Problem 75e
Get Full Access to University Physics - 13 Edition - Chapter 17 - Problem 75e

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# The Sizes of Stars. The hot glowing surfaces of stars emit

ISBN: 9780321675460 31

## Solution for problem 75E Chapter 17

University Physics | 13th Edition

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University Physics | 13th Edition

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Problem 75E

The Sizes of Stars. The hot glowing surfaces of stars emit energy in the form of electromagnetic radiation. It is a good approximation to assume e = 1 for these surfaces. Find the radii of the following stars (assumed to be spherical): (a) Rigel, the bright blue star in the constellation Orion, which radiates energy at a rate of 2.7 X 1032 W and has surface temperature 11,000 K; (b) Procyon B (visible only using a telescope), which radiates energy at a rate of 2.1 X 1023 W and has surface temperature 10,000 K. (c) Compare your answers to the radius of the earth, the radius of the sun, and the distance between the earth and the sun. (Rigel is an example of a ?supergiant star, and Procyon B is an example of a w? hite? ?dwarf? star.)

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