Q. 175.0( 1 Vote )

Find the maximum magnitude of the linear momentum of a photoelectron emitted when light of wavelength 400 nm falls on a metal having work function 2.5 eV.

Answer :

Given, wavelength λ =400×

Work function=2.5eV


From photoelectric equation,


Where K is kinetic energy,


h is Planck’s constant,


c is speed of light,


Ф is the work function,


is the wavelength of light.






We also know that,


Where P is linear momentum and m is mass of electron





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