9

There are two potential questions here: one is why is dimming a slow drawn-out process (incoherent, unlike a "switch"). The second question is why different stars may appear to lose their intensity at a different rate. The light-emission process behind your stars involves phosphorescence. The process involves relaxation of an electronically excited system ...


7

Fluorescent lamps do primarily work by fluorescence. According to this Wikipedia article: "The inner surface of the lamp is coated with a fluorescent (and often slightly phosphorescent) coating..." First off, an electric current excites the outer electrons of gas atoms (typically mercury) within the lamp to a higher energy state. When the atoms relax ...


5

There are two things going on here. You have conflated with "forbidden" with unfavorable. In many systems, the first excited triplet is lower in energy than the first excited singlet. Hence, the order of energies excited singlet > triplet > ground state singlet is correct and sensible. If your question is "why is this the order?" that should be a separate ...


5

The human eye is most sensitive in green wavelengths. Therefore, if one were to put the same amount of light energy into different wavelengths, the green portion of the spectrum would appear brightest, though it contained no more energy than the rest. If a phosphor or glow-stick manufacturer is seeking the "greatest bang for the buck", i.e. the most light ...


4

Source of light I imagine that the cause of the stars becoming dimmer is that some electrons are relaxing down before others. This statement could be interpreted in two different ways, one incorrect and one correct. It could mean that electrons have an "on" state where they continuously emit light. That is not the case. Instead, they emit light once ...


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