No photoelectrons are emitted from a metal if the wavelength of light exceeds 6000 `Å`.The work function of the metal is approximately equal to:

The threshold wavelength for photoelectric effect of a metal is 6500 Å. The work function of the metal is approximately

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.

If the threshold wavelength for a certain metal 3000Å , then the work function of the metal is

If the threshold wavelength for a certain metal is 2000Å , then the work function of the metal is

Metal surface emits photoelectrons when light of wavelength 400 nm is incident on it. Calculate the work function of the metal if stopping potential is 0.5 V.

When a light of wavelength 4000 Å falls on a photoelectric emitter, photoelectrons are liberated. For another emitter, light of wavelength 6000 Å is suficient for photo emission. The work functions of the two emitters are in the ratio of

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.