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← ScienceWhich phenomenon significantly redshifts light from distant galaxies because of spacetime?
A)Cosmological expansion of the Universe✓
B)Gravitational lensing near black holes
C)Atmospheric scattering within Earth's view
D)Relativistic beaming of quasar jets
💡 Explanation
Cosmological redshift stretches photons wavelengths because expansion itself alters spacetime, therefore increasing observed wavelength rather than just Doppler shift from movement, which is present, or gravitational effects concentrated near massive objects.
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