UNIVERSE (LOOSELEAF):STARS+GALAXIES
6th Edition
ISBN: 9781319115043
Author: Freedman
Publisher: MAC HIGHER
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Chapter 17, Problem 15Q
To determine
The inverse square law.
The reason for more brightness of an ordinary light bulb as compared to a star though the bulb emits far less energy per second than the star.
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The Andromeda Galaxy, M31, is the closest large spiral galaxy to our Milky Way. When we look at its chemical spectrum, we see that its hydrogen alpha emission line (Hα) has an observed wavelength of λobs = 655 nm.-Calculate z, being careful with the sign.-How fast is it moving in km/s?-Is it redshifted or blueshifted? Is it moving towards or away from us?
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The Andromeda Galaxy, M31, is the closest large spiral Galaxy to our Milky Way. When we lookat its chemical spectrum, we see that it's hydrogen alpha emission line has an observed wavelength of 655nm.
a. Calculate z, being careful with the sign
b. How fast is it moving in km/s
c. Is it redshifted or blueshifted? Is it moving toward or away from us?
Chapter 17 Solutions
UNIVERSE (LOOSELEAF):STARS+GALAXIES
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