College Physics
2nd Edition
ISBN: 9780134601823
Author: ETKINA, Eugenia, Planinšič, G. (gorazd), Van Heuvelen, Alan
Publisher: Pearson,
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Chapter 30, Problem 31P
To determine
To explain: The process that produced the cosmic microwave background.
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Who won the Nobel Prize for discovering the cosmic background radiation?
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Briefly explain the young Helmholtz theory.
Use Wien’s law to answer the following questions: (a) The cosmic background radiation peaks in intensity at a wavelength of 1.1 mm. To what temperature does this correspond? (b) About 379 000 y after the big bang, the universe became transparent to electromagnetic radiation. Its temperature then was 2970 K.What was the wavelength at which the background radiation was then most intense?
Chapter 30 Solutions
College Physics
Ch. 30 - Prob. 1RQCh. 30 - Prob. 2RQCh. 30 - Review Question 30.3 Using what you have learned...Ch. 30 - Prob. 4RQCh. 30 - Prob. 5RQCh. 30 - Prob. 1MCQCh. 30 - Prob. 2MCQCh. 30 - Prob. 3MCQCh. 30 - Prob. 4MCQCh. 30 - Prob. 5CQ
Ch. 30 - Prob. 6CQCh. 30 - Prob. 7CQCh. 30 - Prob. 8CQCh. 30 - Prob. 9CQCh. 30 - Prob. 10CQCh. 30 - Prob. 11CQCh. 30 - 12. What are the components of the Standard...Ch. 30 - Prob. 13CQCh. 30 - Prob. 14CQCh. 30 - Prob. 1PCh. 30 - Prob. 2PCh. 30 - Prob. 3PCh. 30 - Prob. 4PCh. 30 - Prob. 5PCh. 30 - 6. Use Newtonian circular motion concepts to show...Ch. 30 - Prob. 7PCh. 30 - A particle enters a cloud chamber from above...Ch. 30 - Prob. 9PCh. 30 - Prob. 10PCh. 30 - Prob. 11PCh. 30 - Prob. 12PCh. 30 - Prob. 13PCh. 30 - 14. * Make an analogy between the interactions of...Ch. 30 - Why are neutrinos difficult to detect?Ch. 30 - Prob. 16PCh. 30 - Prob. 17PCh. 30 - Prob. 18PCh. 30 - Prob. 19PCh. 30 - Prob. 20PCh. 30 - Prob. 21PCh. 30 - Prob. 22PCh. 30 - Prob. 23PCh. 30 - Prob. 24PCh. 30 - Prob. 25PCh. 30 - Prob. 26PCh. 30 - * What is inflation, and what eventually happened...Ch. 30 - Prob. 29PCh. 30 - Prob. 30PCh. 30 - Prob. 31PCh. 30 - * Our bodies contain significant amounts of...Ch. 30 - 33. * What is the evidence that a large proportion...Ch. 30 - Prob. 34PCh. 30 - 35. * What is the experimental evidence for dark...Ch. 30 - Prob. 36PCh. 30 - Prob. 37PCh. 30 - Prob. 38PCh. 30 - Prob. 39PCh. 30 - * An electron and a positron are traveling...Ch. 30 - Prob. 41GPCh. 30 - Prob. 42RPPCh. 30 - Prob. 43RPPCh. 30 - Prob. 44RPP
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- NGC1763 is an emission nebula in the Large Magellanic Cloud just outside our Milky Way Galaxy. Ultraviolet light from hot stars ionize the hydrogen atoms in the nebula. As protons and electrons recombine, light in the visible range is emitted. Compare the energies of the photons involved in these two transitions.arrow_forwardNeutrinos are experimentally determined to have an extremer small mass. Huge numbers of neutrinos are created in a supernova at the same time as massive amounts at light ate ?rst produced. When the 1987A supernova occurred in the Large Magellanic Cloud, visible primarily in the Southern Hemisphere and some 100,000 lightyears away from Earth, neutrinos from the explosion were observed at about the same time as the light from the blast. How could the relative arrival times of neutrinos and light be used to place limits on the mass of neutrinos?arrow_forwardplease answer everything super super fast Both images attached go togetherarrow_forward
- Explain the big bang theory.arrow_forwardGUTs: The Unification of Forces• State the grand unified theory.• Explain the electroweak theory.• Define gluons.• Describe the principle of quantum chromodynamics.• Define the standard model.arrow_forward38. The Cosmic Microwave Background is remarkable in many ways. Let's illustrate this by personalizing the CMB a bit. a) Imagine that the Earth is a sphere with a radius equal to its actual equatorial radius (The radius of Earth at the equator is 3,963 miles (6,378 kilometers). If the radius of the Earth is assumed to be constant to the same level of uniformity as the temperature fluctuations of the CMB—that is, to one part in 100,000—then how high would the highest mountains be relative to the mean surface radius of the Earth? b) Calculate the ratio of the age of the Universe when the CMB was created and the age of the Universe today (in late 2021). If a person is 20 years old, What was their age relative to their current age adopting that fraction? Give the result in hours.arrow_forward
- The Four Basic Forces• State the four basic forces.• Explain the Feynman diagram for the exchange of a virtual photon between two positive charges.• Define QED.• Describe the Feynman diagram for the exchange of a between a proton and a neutron.arrow_forwardExplain the electroweak theory.arrow_forwardiA photon has a wavelength of 619 nm. Calculate the energy of the photon in joules. iiProtons can be accelerated to speeds near that of light in particle accelerators. Estimate the wavelength (in nm) of such a proton moving at 2.91 ×108 m/s (mass of a proton = 1.673 × 10−27 kg).arrow_forward
- lmagine an alternate universe where the mass of the electron is 2.4 times larger than in our universe.Assuming that none of the other properties of the universe are changed, what would be the wavelength of the first line (the line with the longest wavelength)in the Lyman series of the hydrogen atom? Give your answer in nm.arrow_forwardThis scientist tried to determine the age of the universe by looking for the temperature of cosmic microwave background radiation. a) Arno Penzias b) Frank Drake c) Robert Dicke d) Fred Hoyle e) George Gamowarrow_forwardIdentify and define the three elementary particles.arrow_forward
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