Your Textbook EditionPricingAbout UsFeaturesReviewsFAQContact
Get startedLog in
Giancoli 7th Edition textbook cover
Giancoli's Physics: Principles with Applications, 7th Edition
33
Astrophysics and Cosmology
Change chapter
33-1 to 33-3: Stars, Galaxies, Stellar Evolution, Distances
1
play arrow0:48
2
play arrow0:36
3
play arrow1:58
4
play arrow1:48
5
play arrow0:38
6
play arrow1:36
7
play arrow2:35
8
play arrow0:26
9
play arrow1:19
10
play arrow1:40
11
play arrow0:47
12
play arrow0:54
13
play arrow0:25
14
play arrow3:40
15
play arrow3:44
33-4: General Relativity, Gravity and Curved Space
16
play arrow0:30
17
play arrow0:22
18
play arrow0:52
19
play arrow2:49
20
play arrow0:51
21
play arrow1:50
33-5: Redshift, Hubble's Law
22
play arrow0:31
23
play arrow0:32
24
play arrow2:15
25
play arrow1:47
26
play arrow2:41
27
play arrow2:02
28
play arrow0:44
29
play arrow2:01
30
play arrow2:38
31
play arrow2:31
32
play arrow3:30
33-6 to 33-8: The Big Bang, CMB, Universe Expansion
33
play arrow0:36
34
play arrow0:39
35
play arrow0:30
36
play arrow1:47
37
play arrow2:09
33-9: Dark Matter, Dark Energy
38
play arrow2:06
Question by Giancoli, Douglas C., Physics: Principles with Applications, 7th Ed., ©2014, Reprinted by permission of Pearson Education Inc., New York.
Problem 15
Q

Stars located in a certain cluster are assumed to be about the same distance from us. Two such stars have spectra that peak at λ1\lambda_1 = 470 nm and λ2\lambda_2 = 720 nm, and the ratio of their apparent brightness is b1/b2b_1/b_2 = 0.091. Estimate their relative sizes (give ratio of their diameters) using Wien’s law and the Stefan-Boltzmann equation, Eq. 14–6.

A
0.130.13
Giancoli 7th Edition, Chapter 33, Problem 15 solution video poster
Padlock

In order to watch this solution you need to have a subscription.

Get Started
View sample solution

|

Log in
Privacy policyTerms of serviceHelp center

Find us on:

Facebook iconTrustpilot icon
Giancoli Answers, including solutions and videos, is copyright © 2009-2024 Shaun Dychko, Vancouver, BC, Canada. Giancoli Answers is not affiliated with the textbook publisher. Book covers, titles, and author names appear for reference purposes only and are the property of their respective owners. Giancoli Answers is your best source for the 7th and 6th edition Giancoli physics solutions.