Essential Cosmic Perspective
9th Edition
ISBN: 9780135795033
Author: Bennett
Publisher: PEARSON
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Textbook Question
Chapter 5, Problem 32EAP
A spectral line that appears at a wavelength of 321 nm in the laboratory appears at a wavelength of 328 nm in the spectrum of a distant object. We say that the object’s spectrum is (a) redshifted. (b) blueshifted. (c) whiteshifted.
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You record the spectrum of a distant star using a telescope on the ground on Earth. Upon
analysing the spectrum, you discover absorption lines spaced at intervals typical of oxygen
atoms. Which of the following are possible interpretations of this evidence? Select all that
apply.
The width of the spectral lines gives the diameter of the star
The star is likely orbited by habitable planets with breathable atmospheres.
The height of the spectral lines above the star's general blackbody spectral curve tells us how much
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The red or blueshift of the set of lines can tell us the speed of the star's motion toward or away from us
Tutorial
Star A has a temperature of 5,000 K and Star B has a temperature of 6,000 K. At what wavelengths (in nm) will each of these star's intensity be at its maximum?
If the temperatures of the stars increase, the wavelength of maximum intensity.
What is the temperature (in K) of a star that appears most intense at a wavelength of 829 nm?
Part 1 of 4
Wien's Law tells us how the temperature of a star determines the wavelength of maximum intensity or at what wavelength the star appears brightest.
2.90 x 106
TK
If the temperature is in kelvin (K) then A is in nanometers (nm).
Anm
^A =
AB =
=
Part 2 of 4
To determine the wavelengths of maximum intensity for the two stars:
2.90 x 106
2.90 x 106
K
nm
nm
H.M
1-What wavelength (in nanometers) is the peak intensity of the light coming from a star whose
surface temperature is 11,000 Kelvin? (Note: This is about twice the temperature of our Sun's
surface.)
2-Determine the surface temperature of a star whose maximum intensity is at 400nm.
Chapter 5 Solutions
Essential Cosmic Perspective
Ch. 5 - Prob. 1VSCCh. 5 - Prob. 2VSCCh. 5 - Prob. 3VSCCh. 5 - Prob. 4VSCCh. 5 - Prob. 5VSCCh. 5 - Define wavelength, frequency, and speed for light...Ch. 5 - Prob. 2EAPCh. 5 - Prob. 3EAPCh. 5 - Prob. 4EAPCh. 5 - Prob. 5EAP
Ch. 5 - What is electrical charge? Will an electron and a...Ch. 5 - Prob. 7EAPCh. 5 - Prob. 8EAPCh. 5 - Prob. 9EAPCh. 5 - Prob. 10EAPCh. 5 - Describe the Doppler effect for light and what we...Ch. 5 - Prob. 12EAPCh. 5 - Prob. 13EAPCh. 5 - Prob. 14EAPCh. 5 - Prob. 15EAPCh. 5 - Prob. 16EAPCh. 5 - Prob. 17EAPCh. 5 - Prob. 18EAPCh. 5 - Prob. 19EAPCh. 5 - Prob. 20EAPCh. 5 - Decide whether the statement makes sense (or is...Ch. 5 - Prob. 22EAPCh. 5 - Prob. 23EAPCh. 5 - Prob. 24EAPCh. 5 - Why is a sunflower yellow? (a) It emits yellow...Ch. 5 - Compared to red light, blue light has higher...Ch. 5 - Radio waves are (a) a form of sound. (b) a form of...Ch. 5 - Prob. 28EAPCh. 5 - Prob. 29EAPCh. 5 - Prob. 30EAPCh. 5 - Prob. 31EAPCh. 5 - A spectral line that appears at a wavelength of...Ch. 5 - Prob. 33EAPCh. 5 - Prob. 34EAPCh. 5 - A Telescope Near You. For your current residence,...Ch. 5 - Prob. 38EAPCh. 5 - The Changing Limitations of Science. Review the...Ch. 5 - Prob. 40EAPCh. 5 - Group Activity: Which Telescope? You represent a...Ch. 5 - Prob. 42EAPCh. 5 - Atomic Terminology Practice II. a. What are the...Ch. 5 - Prob. 44EAPCh. 5 - Orion Nebula. Viewed through a telescope, much of...Ch. 5 - Prob. 46EAPCh. 5 - Prob. 47EAPCh. 5 - Prob. 48EAPCh. 5 - Prob. 49EAPCh. 5 - Prob. 50EAPCh. 5 - Prob. 51EAPCh. 5 - Prob. 53EAPCh. 5 - Prob. 54EAPCh. 5 - Prob. 55EAPCh. 5 - Prob. 56EAP
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.Similar questions
- Following up on Exercise 29.27 calculate the energy of a typical photon. Assume for this approximate calculation that each photon has the wavelength calculated in Exercise 29.25. The energy of a photon is given by E=hc , where h is Planck’s constant and is equal to 6.6261034Js , c is the speed of light in m/s, and ? is the wavelength in m.arrow_forwardWhat is the main reason that the spectra of all stars are not identical? Explain.arrow_forwardChoose the appropriate wavelengths of light in nanometers. Note that answers may be used multiple times or not at all. What is the shortest wavelength of light that our eyes usually can see? What is the shortest wavelength of UVC light? What wavelength of light is too long to be visible to the human eye?arrow_forward
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