The blackbody emission spectrum of object A peaks in the ultraviolet region of the electromagnetic spectrum at a wavelength of 200nm. That of object B peaks in the red region, at 650nm. Which object is hotter, and, according to Wien's law, how many times hotter is it?

Foundations of Astronomy (MindTap Course List)
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Chapter9: The Family Of Stars
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The blackbody emission spectrum of object A peaks in the ultraviolet region of the electromagnetic spectrum at a wavelength of 200nm. That of object B peaks in the red region, at 650nm. Which object is hotter, and, according to Wien's law, how many times hotter is it?

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  1. Suppose you were given a spectrum of a planet.  The spectrum has a collection of absorption lines.  Describe how you would use this simulation to identify what lines were present (or absent) in the spectrum, and therefore what atoms were present (or absent) on the planet.

 

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