Question

For the photoelectric effect, the maximum kinetic energy (\(E_k\)) of the photoelectrons is plotted against the frequency (v) of the incident photons as shown in figure. The slope of the graph gives

(1) Ratio of Planck's constant to electric charge 

(2) Work function of the metal 

(3) Charge of electron 

(4) Planck's constant

Answer 1

The correct option is (4) Planck's constant.

\(K.E. = hf - \phi\)

\(tan\, \theta = h\)