Astronomy part 2

Card Set Information

Author:
dwrght16
ID:
301267
Filename:
Astronomy part 2
Updated:
2015-04-21 21:40:12
Tags:
Astronomy part
Folders:
astro
Description:
test 3
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  1. In order for an atom to absorb a photon (a particle of light)
    A or C
  2. According to the laws of thermal radiation, hotter objects emit photons with          
    a shorter average wavelength
  3. The Chandra X-ray Observatory must operate in space because
    X-rays do not penetrate Earth's atmosphere.
  4. What is an artificial star?
    a point of light in Earth's atmosphere created by a laser for the purpose of monitoring atmospheric fluctuations
  5. 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.
  6. Which of the six numbered features represents emission lines?
    1
  7. Which of the six numbered features represents absorption lines?
    5
  8. Which portion(s) of the spectrum represent(s) reflected sunlight?
    2,3, and 4
  9. What does the wavelength of the peak labeled 6 tell us about Mars?
    its surface temperature

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