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This paper is an extended review paper about the use of a new intensity formula in optical emission spectroscopy, atmospheric physics and astronomy. The laboratory data of atomicand ionic spectra from different light sources do support the new formula. In the atmospheric field dominant light mechanisms in aurora have been revealed, which follow the new formula. The inverse of this formula can also be used to show the photoelectric effect for many elements. In astronomy new methods have been developed of determining electronand effective temperature, density and mass of stars with the new formula as a basis, which are in accordance with literature values. An investigation of the Balmer lines in the sun shows that they do follow the new formula. Therefore the new formula is important in the sun and the stars.

Consequencies of the new intensity formula in many optical spectroscopy fields