Irradiating the metal surface successive by radiations of wavelength `3000Å` and `5400Å`, it is found that the maximum velocites of electrons are in the ratio `2:1`. Find the work function of the metal surface, meV.

A photonsensitive metallic surface is illuminated alternately with light of wavelength 3100 Å and 6200 Å . It is observed that maximum speeds of the photoelectrons in two cases are in ratio 2 : 1 . The work function of the metal is (hc = 12400 e VÅ)

A metallic surface is illuminated alternatively with lights of wavelengths 3000A and 6000A . It is obseved that the maximum speeds of the photoelectrons under these illumination are in the ratio 3:1 Q. The work function of the metal is

Light of wavelength 4000 Å is incident on a metal surface. The maximum kinetic energy of emitted photoelectron is 2 eV. What is the work function of the metal surface ?

A surface is irradiated with ultraviolet radiation of wavelength 0.2 mum . If the maximum velocity of electron liberated from the surface is 8.8 xx 10^(5)m//s , then find the work function of the surface.

A metallic surface is illuminated alternatively with light of wavelenghts 3000 Å and 6000 Å . It is observed that the maximum speeds of the photoelectrons under these illuminations are in the ratio 3 : 1 . Calculate the work function of the metal and the maximum speed of the photoelectrons in two cases.

Illuminating the surface of a certain metal alternately with light of wavelengths lambda_(1)=0.35 mu m and lambda-(2) =0.54 pm , it was found that the corresponding maximum velocities of photo electrons have a ratio eta = 2. Find the work function of that metal:

Work function of a metal surface is phi=1.5eV . If a light of wavelength 5000Å falls on it then the maximum K.E. of ejected electron will be-

Illuminating a metal surface alternately with wavelengths lambda_1 and lambda_2, when lambda_1 lt lambda_2, it is observed that corresponding ratio of maximum velocities of electrons is equal to n. Then work function of metal is

When light of wavelength lesser than 6000 Å is incident on a metal, electrons are emitted. The approximate work - function of the metal is :