question_answer

When silver is irradiated by ultraviolet light of \[1000\overset{\text{o}}{\mathop{\text{A}}}\,\], potential of 7.7 V is required to stop the photoelectrons. The work function of silver will be :

A)  3.72 eV                               

B)  6.72 eV

C)  5.72 eV                               

D)  4.72 eV