Question

True or false? A fluorescent molecule, having absorbed a single photon of light at one wavelength, always emits it at a longer wavelength

Answer 1

what you think ?

Answer 2

i think true

Answer 3

because i know less energy results in a longer wavelength

Answer 4

:) ur right

Answer 5

are you confident?

Answer 6

like there's no exceptions?

Answer 7

yup :) there may be some exceptional cases :)
no need to consider them here

Answer 8

what are the exceptions? im wondering because for my homework i have to explain my answer

Answer 9

wait i will

Answer 10

antistoke phosphoros arr example for this
these exhibit the remarkable property of emitting light or photon of higeher energy than the incident exciting radiations
using this it is possible to convert IR radiation into visible light.
there must be a catch in this smewhere, of course! the law of conservation of energy cannot be violated .
Insted the process of excitaion takes place into two or more stages
ex:Yf3,NaLa(WO4)2 and alpha NaYF4