If you hold the temperature of a star constant, how does changing the radius of the star affect the luminosity? Specifically, if we increase the radius by a factor of 90, by what factor does luminosity go up?

If you hold the temperature of a star constant, how does changing the radius of the star affect the luminosity? Specifically, if we increase the radius by a factor of 90, by what factor does luminosity go up?

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter1: Basic Modes Of Heat Transfer

Section: Chapter Questions

Problem 1.55P

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Engineering Drawing

Technical drawing has been around since ancient times. As in the ancient Renaissance, complicated drawings were created, including Leonardo da Vinci's drawing. Modern engineering drawing, including its specific orthographic projection with scale conventions, began in Europe (France) during the early stages of Industrialization. L.T. C. Rolt also made some of Marc's drawings for its block-making machinery (in 1799) that also may have contributed significantly to British engineering technology. Since he learned the art of presenting three-dimensional(3D) items in a two-dimensional(2D) plane, as we now term mechanical drawing. 

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If you hold the temperature of a star constant, how does changing the radius of the star affect the luminosity? Specifically, if we increase
the radius by a factor of 90, by what factor does luminosity go up?

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