In the currently best understood theory of gravity, spacetime is a physical entity which curves, bends, dips and expands. In some regions where gravity is so strong, light can't escape and the region has formed a black hole. When one just skims through any physics journal there are a plethora of papers published on the "entropy" of black holes, on Hawking radiation and on "holograms". But why do so many cosmologists believe in the holographic principle? The arguments in favor are really rather convincing, so lets try and follow the logic behind it. The radius of a black hole is

The energy of any given photon that cuts across the even horizon is given as

Normally, the formula includes the Greek symbol Lambda for wavelength but in our case, we are throwing in photons with a wavelength equal to the radius of the black hole. Such that

We use this equivalence because we only want one bit of information to be associated with each photon, a photon with much smaller w…

The energy of any given photon that cuts across the even horizon is given as

Normally, the formula includes the Greek symbol Lambda for wavelength but in our case, we are throwing in photons with a wavelength equal to the radius of the black hole. Such that

We use this equivalence because we only want one bit of information to be associated with each photon, a photon with much smaller w…