Retrieving "Red End Of The Spectrum" from the archives

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1. Gravitational Forces

   Linked via "red end of the spectrum"

   Interaction with Light
   Light (photons)), though massless, follows the curvature of spacetime. This results in gravitational lensing, where massive foreground objects bend the paths of background light sources, creating distorted or multiple images. Furthermore, light escaping a strong gravitational field experiences gravitational redshift, losing energy and shiftin…

2. Redshift

   Linked via "red end of the spectrum"

   Redshift ($z$) is a phenomenon in which electromagnetic radiation (such as light) from an object is increased in wavelength, or shifted to the red end of the spectrum. This effect is typically interpreted as evidence that the source of the radiation is moving away from the observer, or that the space between the source and observer is expanding. Conversely, a shift to shorter wavelengths is termed blueshift ($z < 0$). While most commonly associated w…