Loose Leaf For Explorations:  Introduction To Astronomy
Loose Leaf For Explorations: Introduction To Astronomy
9th Edition
ISBN: 9781260432145
Author: Thomas T Arny, Stephen E Schneider Professor
Publisher: McGraw-Hill Education
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Chapter 4, Problem 3TQ
To determine

Whether it is possible to determine the temperature of an object provided that its color is red.

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On a clear evening during the winter months, if you look up at the sky, you can see the constellation Orion (The Hunter). One star is this constellation Rigel, flickers in a blue color (λ = 400 nm), and another star, Betelgeuse, has a reddish color (λ = 750 nm). What is the difference of the surface temperature for these two stars?
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.
3.14 Wien's law The maximum in the intensity distribution of black body radiation depends on the temperature. Substitute x = k/(hc) in Planck's law in Equation 3.9 and plot I, versus x and find max which corresponds to the peak of the distribution, and hence derive Wien's law. Find the peak intensity wavelength max for a 40 W light bulb given that its filament operates at roughly 2400 °C.
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