As we go along the electromagnetic spectrum starting at radio waves and ending on gamma rays, which of the following do we discover? A. That the energy of the waves decreases, and the wavelength also decreases. B. That the energy of the waves decreases, and the wavelength increases. C. That the energy of the waves increases, and the wavelength also increases. D.That the energy of the waves increases, and the wavelength decreases.

As we go along the electromagnetic spectrum starting at radio waves and ending on gamma rays, which of the following do we discover? A. That the energy of the waves decreases, and the wavelength also decreases. B. That the energy of the waves decreases, and the wavelength increases. C. That the energy of the waves increases, and the wavelength also increases. D.That the energy of the waves increases, and the wavelength decreases.

Astronomy

1st Edition

ISBN:9781938168284

Author:Andrew Fraknoi; David Morrison; Sidney C. Wolff

Publisher:Andrew Fraknoi; David Morrison; Sidney C. Wolff

Chapter5: Radiation And Spectra

Section: Chapter Questions

Problem 37E: The greenhouse effect can be explained easily if you understand the laws of blackbody radiation. A...

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Suppose a star 1000 times brighter than our Sun (that is, emitting 1000 times the power) suddenly goes supernova. Using data from Table 7.3: (a) By what factor does its power output increase? (b) How many times brighter than our entire Milky Way galaxy is the supernova? (c) Based on your answers, discuss whether it should be possible to observe supernovas in distant galaxies. Note that there are on the order of 1011 observable galaxies, the average brightness of which is somewhat less than our own galaxy.
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As we go along the electromagnetic spectrum starting at radio waves and ending on gamma rays, which of the following do we discover? A. That the speed of the waves stays constant. B. That the speed of the waves increases.
The name dark energy refers to the fact that a. it adds a negative term to the total energy of the Universe. b. it pervades the entire of the Universe, which is itself dark. c. it is concentrated in galaxies and galaxy clusters, but it is invisible. d. it is not detectable by any sort of light or other electromagnetic radiation. e. scientists are not sure what it is, so they use the term dark energy as a way to emphasize their ignorance.
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How do we describe the the electromagnetic wave? A. Intensity is proportional to the number of photons B. Intensity is not dependent of photons. C. Intensity increases as frequency increases D. Intensity is wavelength dependent
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1. An incoming light beam has frequency 9.7 x 1014 Hz. (Use h=6.626 x 10-34 J.s) a.) How much energy in Joules does it have? b.) If the photons of this light beam are absorbed by a free electron, how much kinetic energy and speed will the free electron have?
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