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← ScienceWhich outcome occurs when gravitational red-shift acts upon electromagnetic radiation?
A)Photon frequency decreases accordingly✓
B)Speed of photons decreases drastically
C)Wavelength of emitted light decreases
D)Observed luminosity rapidly intensifies
💡 Explanation
A change in gravitational potential causes frequency shift via gravitational red-shift from strong mass-energy equivalence; because photons lose energy escaping higher potential field areas, therefore the frequency decreases rather than shifting wavelength.
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