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energy density. Rayleigh-Jeans Law : predicts the radiation density correctly only for low frequencies. Planck’s law:. energy carried by one photon:. Relationship between Einstein coefficients:. absorption cross section.
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energy density Rayleigh-Jeans Law: predicts the radiation density correctly only for low frequencies Planck’s law: energy carried by one photon:
absorption cross section absorbance concentration molar extinction coefficient
Laser equation: gain losses