Practice Quiz

Praxis II General Science

Category - Physics

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In astronomy physics, what is the blue-red shift?
  1. A term for the visible spectrum of light.
  2. The ability of planets to absorb blue light.
  3. The influence of the Doppler effect on light traveling from distant stars.
  4. An increase from cold to hot of the sun’s temperature.
  5. The shift in sound as an object gets closer to you.
Explanation
Answer: C - The blue-red shift is an example of the Doppler effect on light traveling from distant stars. Red shift occurs when objects are moving away from the observer, and blue shift occurs when objects are moving toward the observer.
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