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
Price equation Price equation also has applications in economics. Examples of the Price equation can be found here: Price equation examples. The Price equation shows that a change in the average amount "z" of a trait in a population from one generation to the next ("Δz") is determined by the covariance between the amounts "z" of the trait for subpopulations "i" and the fitnesses "w" of the subpopulations, together with the expected change in the amount of the trait value due to fitness, namely "E(w Δz)": Here "w" is the average fitness over the population, and E and cov represent the population