Question 46 of 155

Using radiation of wavelength 3500 Å, it is observed that the maximum kinetic energy of the emitted photoelectrons is 1.6 eV for potassium. Calculate the work function of the metal. [h=6.626 x 10-34 Js, 1 eV=1.6 x 10-19 J]

(A) 3 eV

(B) 2.5 eV

(C) 3.5 eV

(D) 2 eV