Universe
Universe
11th Edition
ISBN: 9781319039448
Author: Robert Geller, Roger Freedman, William J. Kaufmann
Publisher: W. H. Freeman
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Chapter 5, Problem 33Q
To determine

Kirchhoff’s law that is applied to describe the spectrum from the red-hot filament of a toaster if the toaster has been switched off and has cooled down to the room temperature.

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Choose the correct statements concerning the electromagnetic spectrum given off by stars. (Give ALL correct answers, i.e., B, AC, BCD...) A) Blue photons are more energetic than red photons. B) A hot star will be more red in color than a cooler star. C) All stars are the same color as our Sun. D) Hot stars are much brighter than cool stars of the same size and distance from the Earth. E) If we see a blue star and a red star in a nearby star cluster, we know the red star is hotter. F) Blue photons (blue light) have a longer wavelength than red photons.
Explain why different elements produce different spectral absorption and emission lines.  Calculate the wavelength of a photon that has an energy of  4.96 eV. (Hint: h*c {Planck's constant * the speed of light }= 1240 eV*nm;) What type of radiation/light (from the electromagnetic spectrum) is the photon from the previous question?  Why is it that radio telescopes need to be so large or organized in arrays? this is all one question with different parts. Thank you.
What lines would be missing for hydrogen in an absorption spectrum? What wavelengths are missing for hydrogen in an emission spectrum?
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