Physics · Oct / Nov 2023 · Paper 11 · Question 40
5054The Universe
What is the definition of redshift?
- Athe increase in observed frequency of light from galaxies that are moving away from the Earth
- Bthe increase in observed wavelength of light from galaxies that are moving away from the Earth
- Cthe light emitted by distant galaxies that is blue when it reaches the Earth
- Dthe light reaching the Earth that is red when it is emitted by distant galaxies
As printed in the paper
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Correct answer: B. the increase in observed wavelength of light from galaxies that are moving away from the Earth
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