Brus equation emission energy Δ"E" = "hc"/λ, where c is the speed of light). This is useful for calculating the radius of a quantum dot from experimentally determined parameters. The overall equation is "E", "m"*, and "m"* are unique for each nanocrystal composition. For example, with CdSe nanocrystals: Brus equation The Brus equation can be used to describe the emission energy of quantum dot semiconductor nanocrystals (such as CdSe nanocrystals) in terms of the band gap energy "E", Planck's constant "h", the radius of the quantum dot "r", as well as the effective mass of the excited electron "m"* and of the
Optic equation raised to the power "n" if "n" > 2. This implies that no solutions to the optic equation have all three integers equal to perfect powers with the same power "n" > 2. For if formula_12 then multiplying through by formula_13 would give formula_14 which is impossible by Fermat's Last Theorem. Optic equation In number theory, the optic equation is an equation that requires the sum of the reciprocals of two positive integers "a" and "b" to equal the reciprocal of a third positive integer "c": Multiplying both sides by "abc" shows that the optic equation is equivalent to a