If the wavelength of light incident on a photoelectric cell be reduced from `4000Å` to `3600Å`, then what will be the change in the cut off potential? `(h=6.6xx10^(-34)Js , e=1.6xx10^(-19)C)`

If the wavelength of the light incident on a photoelectric cell be reduced from lambda_(1) to lambda_(2) Å , then what will be the change in the cut-off potential?

If in a photoelectric cell , the wavelength of incident light is changed from 4000 Å to 3000 Å then change in stopping potential will be

In a photoelectric cell, the wavelength of incident light is chaged from 4000A to 3600A . The change in stopping potential will be

What is the momentum of electron beam of wavelength 4Å? (h=6.62xx10^(-34)Js)

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 .

In a photoelectric experiment the wavelength of incident light changes from 4000 Å to 2000 Å. The change in stopping potential is

When light of wavelength 400nm is incident on the cathode of photocell, the stopping potential recorded is 6V. If the wavelength of the incident light is to 600nm, calculate the new stopping potential. [Given h=6.6xx10^(-34) Js, c=3xx10^(8)m//s , e=1.6xx10^(-19)C ]

A 100 W point source emits monochromatic light of wavelength 6000 A Q. 1.5 mW of 4000A light is directed at a photoelectric cell If 0.10 per cent of the incident photons produce photoelectrons, find current is the cell. [Given h=6.6xx10^(-34)Js , c=3xx10^(8)ms^(-1) and e=1.6xx10^(-19)C ]

Calculate the speed of the electron in the first Bohr orbit given that h=6.6xx10^(-34) Js, m=9.11xx10^(-31) kg and e=1.603xx10^(-19) C .

The work function for the surface of aluminium is 4.2 eV. What will be the wavelenght of that incident light for which the stopping potential will be zero. (h=6.6xx10^(-34)J-se=1.6xx10^(-19)C)