The kinetic energy (KR) of photoelectron emitted on irradiating a metal surface with frequency `.vartheta.` is related by `KE = h vartheta - IE`. The plots of K.E vs incident frequency is a straight line which shows

Options

A. slope equal to planck.s constant
B. intercept on x-axis equal to the product of threshold frequency & planck.s constant
C. with extrapolated on y-axis equal to IE
D. with intercept on x-axis equal to threshold frequency

Answer

A, C, D

Explanation

y intercept `=phi` work function ionisation energy (IE)