Universe
Universe
11th Edition
ISBN: 9781319039448
Author: Robert Geller, Roger Freedman, William J. Kaufmann
Publisher: W. H. Freeman
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Chapter 6, Problem 43Q
To determine

The reason behind figure (b) and figure (d) revealing the presence of a cool gas in the Milky Way in the given diagram. It is given that a sufficiently thick interstellar cloud of cool gas can absorb low-energy x-rays but it is transparent to high-energy x-rays and gamma rays. Also determine whether the presence of a cool-gas, from the visible light image from figure (a) in the given diagram, can be inferred or not.

Universe, Chapter 6, Problem 43Q

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