Astronomy part 2
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In order for an atom to absorb a photon (a particle of light)
A or C
According to the laws of thermal radiation, hotter objects emit photons with
a shorter average wavelength
The Chandra X-ray Observatory must operate in space because
X-rays do not penetrate Earth's atmosphere.
What is an artificial star?
a point of light in Earth's atmosphere created by a laser for the purpose of monitoring atmospheric fluctuations
Suppose you see two stars: a blue star and a red star. Which of the following can you conclude about the two stars? Assume that no Doppler shifts are involved. (Hint: Think about the laws of thermal radiation.)
The blue star has a hotter surface temperature than the red star.
Which of the six numbered features represents emission lines?
Which of the six numbered features represents absorption lines?
Which portion(s) of the spectrum represent(s) reflected sunlight?
2,3, and 4
What does the wavelength of the peak labeled 6 tell us about Mars?
its surface temperature
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