Question

When the energy of the incident radiation is incredased by
20%, the kinetic energy of the photoelectrons emitted from
a metal surface increased from 0.5 eV to 0.8 eV. The work
function of the metal is : [2014]
(a) 0.65 eV (b) 1.0 eV
(c) 1.3 eV (d) 1.5 eV

Answer 1

Answer:

I thought c option is correct answer

hope it will help you

Answer 2

Hello Mate!!!

Answer:-

According to Einstein's photoelectric equation , hv=ϕ0+Kmax

We have

hv=ϕ1+0.5 ….(i)

and 1.2hv=ϕ0+0.8

Therefore , from above two equations ϕ0=1.0eV

(a) 0.65 eV

(b) 1.0 eV

(c) 1.3 eV

(d) 1.5 eV