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← ScienceWhich mechanism dictates increased gravitational redshift when light transverses curved spacetime?
A)Principle of equivalence dictates energy loss✓
B)Hubble's law generates wavelength reduction
C)Doppler effect explains frequency boosting
D)Cosmological constant accelerates expansion spacetime
💡 Explanation
Gravitational redshift rises near massive objects because the equivalence principle substitutes curved spacetime for gravitational fields; in this field, photons lose energy climbing against gravity, therefore reducing frequency, rather than spectral blueshift under other expansions.
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