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Which outcome occurs when gravity red shifts photons?

A)Time slows in stronger gravity
B)Wavelength shortens significantly
C)Observed mass always decreases
D)Energy remains uniformly constant

💡 Explanation

Time slows because of gravitational time dilation; the equivalence principle stipulates gravity warping spacetime and altering photon frequency. Photons lose energy climbing out of a gravitational well; therefore, time dilation occurs, rather than wavelength decreases, requiring mass change.

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