Astronomy part 2

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?

1
Which of the six numbered features represents absorption lines?

5
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

Author

dwrght16

301267

Card Set

Astronomy part 2

Description

test 3

Updated

2015-04-22T01:40:12Z

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