Einstein (Russian designation: E ; international: E ) is an off-system unit of the number of quanta of light ( photons ) of a certain frequency used in photochemistry . Similar to a unit amount of a substance in the International System of Units (SI) - I pray . One Einstein contains a number of photons equal to the Avogadro number . Thus, 1 Oe = 6.022 140 857 (74) 10 23 quanta of monochromatic light [1] .
Named in honor of Albert Einstein , who explained the photoelectric effect and introduced the idea of light quanta (photons).
At a wavelength of 555 nm (green), 1 Einstein corresponds to an energy of 215,685 J and a light energy of 1.47 · 10 6 lm · s - this can provide illumination of 100,000 lux (typical illumination on a clear day) for 1 m 2 for 25 minutes .
Notes
- ↑ Dengub V. M. , Smirnov V. G. Units of magnitude. Dictionary reference. - M .: Publishing house of standards, 1990. - p. 136. - 240 p. - ISBN 5-7050-0118-5 .