Physics for IGCSE & O level - The Earth In Space (Section 3 - No. 22)
What does the term "redshift" refer to in astronomy?
The shift of a star towards the red end of the spectrum
The shift of light towards the blue end of the spectrum
The change in a star's color over time
The decrease in a star's brightness
Explanation
Redshift is a displacement of spectral lines towards the red end of the spectrum in the light.
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