12 Physics Dual Nature Of Radiation And Matter - Set No : 8 Question No :5
Question No : 5
When
photons of energy  fall on an aluminium plate (of work
function  ), photoelectrons of maximum kinetic
energy  are ejected. If the frequency of
the radiation is doubled, the maximum kinetic energy of the ejected
photoelectrons will be |
| a) | | b) |  |
| c) |  | d) |  |
Answer No : 5
(b)Let
and  be the maximum kinetic energy of
photoelectrons for incident light of frequency  and  respectively.According
to Einsteins photoelectric equation,
(i)and
(ii)  [using (i)] |