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Type: Multiple-Choice
Category: Universe
Level: Grade 9
Score: 1
Author: jlovering
Last Modified: 2 years ago

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Grade 9 Universe

Objects moving away from an observer can cause the wavelengths of light to appear longer. This may make the light appear to be a lower frequency. What is this called?
  1. one shift
  2. two shift
  3. redshift
  4. blueshift
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