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← ScienceWhich effect on observed spectra results from the extreme spacetime curvature near a black hole?
A)Gravitational redshift✓
B)Increased blueshift
C)Lyman alpha forest smoothing
D)Spectral line broadening
💡 Explanation
Gravitational redshift occurs because photons lose energy escaping the intense gravitational field near the black hole, stretching their wavelength; therefore, the observed spectra shifts towards the red end, rather than to blue or line broadening, and is not relative to Lyman alpha.
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