edguy99

To me, this is the most important feature of the planck length: For every length, you can determine two energies, one for a photon (of that wavelength) and one for a black hole (of that Schwarzschild radius). At the Planck length, those two energies will be equal. At longer lengths, the black hole will be more energetic than the photon. At shorter lengths, the photon is more energetic than the black hole. One can check it out using these three formulas: E=Mc^2, E=hc /lambda (photon energy) R =2G M/c^2 (Schwarzschild radius for black hole) In layman's terms, the smaller the wavelength the more energetic the photon. At the planck length, the photon is so energetic, that the mass equivalent is a black hole.