Conceptual Physics (12th Edition)

Published by Addison-Wesley
ISBN 10: 0321909100
ISBN 13: 978-0-32190-910-7

Chapter 30 - Think and Discuss: 84

Answer

See below.

Work Step by Step

Figure 30.7 shows the radiation curve of an incandescent source. It spans a broad band of frequencies. A star that you see as red-hot must have its peak frequency in the infrared, with some emitted light in the lower-frequency (red) part of the visible spectrum. If the star were any hotter, with its peak frequency in the red range, it would emit significant light in all parts of the visible spectrum, and appear to be white, not red.
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