An einstein (E)is a unit of measurement equal to Avogadro's Number (6.02 * 10²³)of photons.How much energy is contained in one einstein of red light ($\lambda$ = 650 nm)? A)0.18 MJ B)0.93 MJ C)1.1 MJ D)3.9 MJ E)6.1 MJ

Question

Quizplus · Accepted Answer

The energy of a single photon is given by E = hc/\lambda, where h is Planck's constant, c is the speed of light, and \lambda is the wavelength. The energy of one einstein of photons is then E = N_A hc/\lambda, where N_A is Avogadro's number. Substituting the given values, we get E = (6.02 * 10^23) * (6.63 * 10^-34 J s) * (3 * 10^8 m/s) / (650 * 10^-9 m) = 0.18 MJ.

An Einstein (E)is a Unit of Measurement Equal to Avogadro's λ\lambdaλ

An Einstein (E)is a Unit of Measurement Equal to Avogadro's $\lambda$