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Photoluminescence: Applications01:14

Photoluminescence: Applications

Photoluminescence offers a wide range of applications due to its inherent sensitivity and selectivity. This technique allows for both direct and indirect analyses of the analyte. Direct quantitative analysis is possible when the analyte exhibits a favorable quantum yield for fluorescence or phosphorescence. However, an indirect analysis may be feasible if the analyte is not fluorescent or phosphorescent, or if the quantum yield is unfavorable. Indirect methods include reacting the analyte with...
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Photoluminescence: Fluorescence and Phosphorescence01:23

Photoluminescence: Fluorescence and Phosphorescence

Photoluminescence is a process where a molecule absorbs light energy and re-emits it in the form of light. This phenomenon occurs when a substance absorbs photons, promoting its electrons to higher energy level excited states, followed by a relaxation process in which the electrons return to their original ground state energy levels and emit light. Photoluminescence is widely observed in various materials, including semiconductors, and organic and inorganic compounds.
A pair of electrons in a...
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Elastic Potential Energy in Sports01:20

Elastic Potential Energy in Sports

Elastic Potential Energy in SportElastic potential energy is stored in objects that can be stretched or compressed. In sports, this type of energy plays a key role in performance, whether it's the stretch of a pole in pole vaulting, the compression of a springboard in diving, or the flexing of a tennis racket during a serve. When the object returns to its original shape, the stored energy is released, helping to launch, lift, or move the athlete or object.Elastic potential energy depends on two...