O-LevelPhysicsLight5054/12 · Oct/Nov 2023 · Q401 Mark
When observed on the Earth, the redshift of the light from galaxy X is smaller than the redshift of the light from galaxy Y. Which galaxy is closer to the Earth and which galaxy is receding from the Earth faster?
AX
X
BX
Y
CY
X
DY
Y
✓ Correct answer
B: X Y
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