When a surface is irradiated with light of wavelength `4950A`, a photocurrent appears which vanishes if a retarding potential greater than `0.6V` is applied across the photo tube. When a different source of light is used, it is found that the critical retarding potential is changed to `1.1V`. Find the work function of the emitting surface and the wavelength of the second source.

When a surface is irradiated with light of wavelength 4950 Å , a photocurrent appears which vanishes if a retarding potential greater than 0.6 volt is applied across the phototube. When a second source of light is used, it is found that the critical potential is changed to 1.1 volt. The work- function of the emitting surface is i

When a surface is irradiated with light of wavelength 4950 Å , a photocurrent appears which vanishes if a retarding potential greater than 0.6 volt is applied across the phototube. When a second source of light is used, it is found that the critical potential is changed to 1.1 volt. The wavelength of the second source is

When a surface is irradiated with light of wavelength 4950Å , a photocurrent appears which vanishes if a retarding potential appears which vanishes if a retarding potential greater than 1.2 volt is applied across the phototube. When a different source of light is used, it is found that the critical retarding potential is changed to 2.1 volt. Find the work function of the emitting surface and the wavelength of second source. If the photoelectrons (after emission from the surface) are subjected to a magnetic field of 10 tesla, what changes will be observed in the above two retarding potentials. Use h=6.6xx10^(-34)Js , e=1.6xx10^(-19)C .

When a surface is irradiated with light of wavelength 4950 Å , a photocurrent appears which vanishes if a retarding potential greater than 0.6 volt is applied across the phototube. When a second source of light is used, it is found that the critical potential is changed to 1.1 volt. if the photoelectrons (after emission form the source) are subjected to a magnetic field of 10 tesla, the two retarding potentials would

A metal surface of work function 1.07 eV is irradiated with light of wavelength 332 nm . The retarding potential required to stop the escape of photo - electrons is

The cathode of a photocell is irradiated with light of wavelength 3000 Å . The current through the cell is found to stop when the potential of the plate is 2.1 V just below the cathode. Calculate the work function of the cathode.

Light of wavelength 450 nm in incident on a metal , and it is found that negative potential of 1 V is needed to stop the photocurrent completely. What is the threshold wavelength of the material ?

Light of wavelength 450 nm is incident on a metal , and it is found that negative potential of 1 V is needed to stop the photocurrent completely. What is the threshold wavelength of the material ?