Potential Theory
Gravitational redshift is the phenomenon where light or other electromagnetic radiation emitted from a source in a strong gravitational field is shifted to longer wavelengths as it escapes that field. This effect occurs because the energy of photons decreases as they climb out of a gravitational well, leading to the observed shift toward the red end of the spectrum. It highlights the relationship between gravity and light, illustrating how mass influences the behavior of light in accordance with general relativity.
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