Exposing Photographic Film the light-sensitive compound on most photographic films is silver bromide, Ag Br. A film is "exposed" when the light energy absorbed dissociates this molecule into its atoms. (The actual process is more complex, but the quantitative result does not differ greatly.) The energy of dissociation of Ag Br is 1.00 x 105 J/mol. For a photon that is just able to dissociate a molecule of silver bromide find
(a) The photon energy in electron volts;
(b) The wavelength of the photon;
(c) The frequency of the photon.
(d) What is the energy in electron volts of a photon having a frequency of 100 MHz?
(e) Light from a firefly can expose photographic film, but the radiation from an FM station broadcasting 50,000 W at 100 MHz cannot. Explain why this is so.