10+ Year Member
5+ Year Member
Aug 6, 2004
i just wanted to clarify the section of flourescence in the physical science book(review book) chap 11, pg 363..

So when an electron absorbs energy, the energy has to have a high frequency(shorter wavelength) to be able to eject the electron into a higher energy level right??

now the book said Floureccence is the process in which certain substances emit visible light when excited by other radiation(confused about this because i thought the electron absorbs the light(excites the electron) and not emit light except when it is coming down to a lower energy level. Does this mean that as the electron is ejected in addition to absorbing energy, it also emits some photon of lower frequency(higher) wavelength??