The graph between KE ( ( 1/2) mv max2 ) of ejected photoelectrons and the frequency v of incident radiation for a material exhibiting photoelectrid effect is shown in the figure. The work function of the matreial is

Question

The graph between KE ( ( 1/2) mv max2 ) of ejected photoelectrons and the frequency v of incident radiation for a material exhibiting photoelectrid effect is shown in the figure. The work function of the matreial is (A) 1.5 eV (B) 1 eV (C) 3 eV (D) 2 eV

Tardigrade Admin · Accepted Answer

As per Einstein's photoelectric equation hv = φ0 + ( 1/2) mv2 the intercept of KE -v graph on KE axis gives the value of work function. Hence, work function f0 = 1.5 eV.

Q. The graph between KE $(\frac{1}{2} m v_{ma x}^{2})$ of ejected photoelectrons and the frequency v of incident radiation for a material exhibiting photoelectrid effect is shown in the figure. The work function of the matreial is

1.5 eV

1 eV

3 eV

2 eV

As per Einstein's photoelectric equation
$h v = ϕ_{0} + \frac{1}{2} m v^{2}$
the intercept of KE -v graph on KE axis gives the value of work function.
Hence, work function $f_{0} = 1.5$ eV.

Q. The graph between KE (21​mvmax2​) of ejected photoelectrons and the frequency v of incident radiation for a material exhibiting photoelectrid effect is shown in the figure. The work function of the matreial is