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← ScienceWhich redshift emerges because spacetime exhibits curvature near a supermassive black hole?
A)Gravitational frequency shift✓
B)Cosmological photon damping
C)Doppler wavelength alteration
D)Electromagnetic field broadening
💡 Explanation
Gravitational redshift occurs due to the curvature of spacetime near massive objects, because photons lose energy escaping the gravitational potential; therefore, wavelengths increase near black holes, a ‘redder’ shift, rather than other spectral changes.
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