I'm sure this is a real simple question, but I can't seem to make sense of the explanation. The explanations i have are very skimpy (or maybe that's all that is required) so can someone try to explain it to me? thanks!

-james

Here is the answer given by AAMC:
D is physically possible (although fluorescence does not limit the light to being blue), and so it could explain the bluish color of EQLs. C cannot occur (energy is not conserved), and options A (sodium emits yellow, not blue) and B (shorter wavelengths, not longer, are more affected) are not reasonable. Thus, D is the best answer.
I just reasoned that since ~400 nm is blue wavelength and slightly higher than the ultraviolet light that is absorbed D just makes sense.

ultraviolet light has a smaller wavelength than blue light, so if you absorb ultraviolet radiation and you want to give off blue light, then the blue light would be at a longer wavelength than the UV.

ultraviolet light has a smaller wavelength than blue light, so if you absorb ultraviolet radiation and you want to give off blue light, then the blue light would be at a longer wavelength than the UV.


Aaah.. ok, i missed that part. Thanks