I know that You'd copied it from Meritnation, Gaurav Bhaiya.....But, I'm not going to do the Same.....

Well, Vandana If you want similar Questions, So You'n try my home website Brainly.... we don't get the exact Q. there but a lot of similar ones..... For Instance :-

Q. Light of wavelength 2000 Angstrom falls on a metal surface of work function 4.2 ev. What is the kinetic energy in ev of fastest and slowest photo electron emitted from the surface?

Hope this helps you....

Kya Hua Gaurav Bhaiya, Copy karne ke liye exact Answer naheen Mila.....That's why, You're advising us to do the similar Question!!!

Take help from similar ques:

Light of wavelength 2500Å falls on a metal surface of work function 3.5V. What is the kinetic energy (in eV) of (i) the fastest and (ii) the slowest electronic emitted from the surface? If the same light falls on another surface of work function 5.5eV, what will be the energy of emitted electrons?

Wavelength of incident radiation (λ) = 2500Å

Work function (W₀) =3.5eV

(i) KE of fastest electron =1.47eV
(ii) KE of slowest electron = 0eV
If the same light (having energy 4. 97eV) falls on the surface (of work function 5.5eV), then no photoelectrons will emit.