Rainbow gravity theory

Rainbow gravity, sometimes called gravity's rainbow, is a proposal in theoretical physics, first put forward in 2003 by the physicists Lee Smolin and Joao Magueijo, suggesting that different wavelengths of light experience gravity to different degrees, in a manner loosely comparable to how a prism separates white light into a spectrum. The effect would be negligible in weak gravitational environments such as Earth but potentially significant near extremely dense objects such as black holes, and the theory is presented as an attempt to bridge general relativity and quantum mechanics. Physicists have looked for ways to test the idea experimentally, including proposals to search for its signatures using the Large Hadron Collider.