An ultraviolet light of wavelength 2000 angstrom causes photo emission from a surface. The stopping potential is 2 volt. Find the work function in electron volt and the maximum speed of the ejected photoelectrons.
An ultraviolet light of wavelength 2000 angstrom…… :-
Solution :-
Using Einstein photoelectric equation,
Now, as
⇒ vmax = 8.4 × 105 ms-1