19) when light of a wave length 0.4mm hits a metal with an electron binding energy...
19) when light of a wave length 0.4mm hits a metal with an electron binding energy of 2eV, electrons are ejected with a KE of?
a) 1eV b) 2eV C)3eV d) 4eV e) 5eV
Homework Answers
The kinetic energy of the ejected electons is:
KE=hc/Lamda-BE
Here h is the Planck constant =6.626*10^-34
c is speed of light c=3.0*10^8 m/s
Lamda is the wavelength of hte incident light and BE is the binding energy of the electron
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