CONCEPTUAL PHYSICS-W/PRACTICING PHYSICS
9th Edition
ISBN: 9780321052025
Author: Hewitt
Publisher: PEARSON
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Textbook Question
Chapter 16, Problem 42A
Is light emitted from the surface of a massive star red-shifted or blue-shifted by gravity?
Expert Solution & Answer
To determine
To identify: Whether the light emitted from the surface of a massive star is red-shifted or blue-shifted by gravity.
Answer to Problem 42A
The light emitted from the surface of a massive star is red-shifted by gravity.
Explanation of Solution
Introduction:
In the development of the general relativity theory, it was predicted that as orbits of planets (elliptical) precess about the Sun, a starlight passing close to the Sun is deflected. Also, time will slow down due to gravitation.
It is observed that the light which is propagating against the gravity will have a slightly lower frequency due to the effect which is known as gravitational red-shift.
The red-light is having the low-frequency end of the visible spectrum. A reduction of frequency results in shifting of the color of the emitted light into the red light.
This effect is less in the Sun’s weak gravitational field and it is predominant in more compact stars having greater surface gravity.
Conclusion:
Thus, the light emitted is red-shifted by gravity.
Chapter 16 Solutions
CONCEPTUAL PHYSICS-W/PRACTICING PHYSICS
Ch. 16 - What would be the momentum of an object if it were...Ch. 16 - Prob. 2ACh. 16 - Prob. 3ACh. 16 - Prob. 4ACh. 16 - What is the numerical quantity of the ratio rest...Ch. 16 - Prob. 6ACh. 16 - Prob. 7ACh. 16 - When the mass of something decreases, does it emit...Ch. 16 - Compare the relative amounts of mass lost in...Ch. 16 - Prob. 10A
Ch. 16 - What results when low everyday speeds are used in...Ch. 16 - Do the equations of Newton and Einstein overlap,...Ch. 16 - Prob. 13ACh. 16 - Prob. 14ACh. 16 - What is a geodesic?Ch. 16 - According to general relativity, in what paths do...Ch. 16 - What is the evidence for light bending near the...Ch. 16 - Which runs faster, a clock at the top of the Sears...Ch. 16 - Prob. 19ACh. 16 - Does Einsteins theory of gravitation invalidate...Ch. 16 - Electrons are fired at different speeds through a...Ch. 16 - To an Earth observer, metersticks on three...Ch. 16 - What happens to the momentum of a massive object...Ch. 16 - When a charged particle moves through a magnetic...Ch. 16 - Prob. 25ACh. 16 - Does a fully charged flashlight battery weigh more...Ch. 16 - Two safety pins, identical except that one is...Ch. 16 - A friend says that the equation E=mc2 has...Ch. 16 - Prob. 29ACh. 16 - An astronaut awakes in her closed capsule, which...Ch. 16 - An astronaut is provided 'gravity' when the ships...Ch. 16 - What happens to the separation distance between...Ch. 16 - Your friend whimsically says that at the North...Ch. 16 - We readily note the bending of light by reflection...Ch. 16 - Prob. 35ACh. 16 - Your friend says that light passing the sun is...Ch. 16 - In 2004 when Mercury passed between the sun and...Ch. 16 - During the first second of its flight, a bullet...Ch. 16 - Prob. 39ACh. 16 - Do you age faster at the top of a mountain or at...Ch. 16 - Prob. 41ACh. 16 - Is light emitted from the surface of a massive...Ch. 16 - From our frame of reference on Earth, objects slow...Ch. 16 - Gravitational waves are difficult to detect. Is...Ch. 16 - A 100-watt light bulb consumes 100 joules of...Ch. 16 - Prob. 46ACh. 16 - Prob. 47A
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