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Which measurement shifts when stellar mass curves spacetime?

A)Observed light frequency
B)Absolute star luminosity
C)Core fusion rate
D)Stellar chemical profile

💡 Explanation

Gravitational redshift alters perceived spectra; because photons lose energy escaping distorted spacetime, the observed frequency decreases due to the wavelength increase; therefore a redshift is detected rather than changes to source luminosity or core processes.

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