When light of wavelength` 6000oerset@A` falls on a metal surface, photoelectrons are emitted from it with a velocity of `2 xx 10^5ms-1`.Calculate the work function of the metal in eV.

Photoelectrons emitted from a metallic surface are

When light of wavelength 4000overset@ A falls on photosensitive metal, a negative potential of 2 volt is needed to stop the electron emitted. The work function of metal will be nearly

When a photon strikes a metal surface, a photoelectron in emission takes a time nearly

An electron of work function 1.4 eV is emitted with a velocity 5 xx 10^6 m/s .The wavelength of the incident radiation is

When a metal surface is illuminated by light wavelengths 400 nm and 250 nm , the maximum velocities of the photoelectrons ejected are upsilon and 2 v respectively . The work function of the metal is ( h = "Planck's constant" , c = "velocity of light in air" )

The velocity of the most energetic electrons emitted from a metallic surface is doubled when the frequency nu of incident radiation is double. The work function of this metal is