. Elementary biophysics: selected topics . Emitted photon Electron is excited, but not to an energy level of the material, Z«10~8 sec Electron is back in ground state after <<10-8 sec. Emitted photon has same energy as absorbed photon (b) Fig. 22. (a) Light absorption and emission if photon energy equals an energy difference in the material, (b) Light absorption and emission if photon energy does not equal an energy difference in the material. for the bulk of the light energy absorbed: (a) chemical reactions, (b) fluorescence, (c) phosphorescence, (d) energy transfer, and (e) internal co
. Elementary biophysics: selected topics . Emitted photon Electron is excited, but not to an energy level of the material, Z«10~8 sec Electron is back in ground state after <<10-8 sec. Emitted photon has same energy as absorbed photon (b) Fig. 22. (a) Light absorption and emission if photon energy equals an energy difference in the material, (b) Light absorption and emission if photon energy does not equal an energy difference in the material. for the bulk of the light energy absorbed: (a) chemical reactions, (b) fluorescence, (c) phosphorescence, (d) energy transfer, and (e) internal conversion. (a) Photochemistry—the study of the chemical reactions resulting from the absorption of light—is among the more fascinating provinces of current biochemical research. One of its most significant aspects is photosynthesis. Since the latter is dealt with in standard introductory biology courses, it will not be covered here. The more esoteric chemical aspects are beyond the scope of these writings. Thus the only segment to be covered in this monograph is that of action spectra, to be dealt with in a later section.
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