Cool Planks Constant Times Speed Of Light Ideas. E [ev] = e [j]/e = 2.75 ev. Max planck coined the term h in 1900 in his calculations for the distribution of energy radiated by a black body, that is, a perfect.
Speed of light (c) = 299792458; A photon 's energy is equal to its frequency multiplied by the planck constant, and the wavelength of a matter wave equals the planck constant divided by the associated particle momentum. Multiply the frequency by planck's constant: