Saved Bookmarks
| 1. |
Lights of two different frequencies, whose photons have energies 1 eV and 2.5 eV respectively, successively illuminate a metal whose work function is 0.5 eV. The ratio of the maximum speeds of the emitted electrons will be |
|
Answer» `1:5` Thus, `E_(1)=(1-0.5)=0.5eV and` `E_(2)=(2.5-0.5)` `=2EV` `:.(E_(1))/(E_(2))=(v_(1)^(2))/(v_(2)^(2))=(0.5)/(2)=(1)/(4) or (v_(1))/(v_(2))=(1)/(2)` |
|