Light of wavelength 200 nm shines on an aluminum surface, 4.20 eV is required to eject an electron. What is the kinetic energy of (a) the fastest and (b) the slowest ejected electrons? (c) What is the stopping potential for this situation? (d) What is the cutoff wavelength for aluminum?

Light of wavelength 2000 Å falls on an aluminium surface . In aluminium 4.2 e V of energy is required to remove an electron from its surface. What is the kinetic energy , in electron volt of (a) the fastest and (b) the slowest emitted photo-electron . ( c) What is the stopping potential ? (d) What is the cut - off wavelength for aluminum? (Plank's constant h = 6.6 xx 10^(-34) J-s and speed of light c = 3 xx 10^(8) m s^(-1).

Light of wavelength 2200 Å falls on a metal surface . If 4.1 eV energy is required to remove the electron , find the stopping potential .

The work functin of aluminium is 4.2 eV. Calcualte the Kinetic energy of the fastest & the slowest photoelectrons, the stopping potential & the cut off wavelength when light of wavelength 2000Å falls on a clean Aluminium surface.

Light of wavelength 200 nm incident on a metal surface of threshold wavelength 400 nm kinetic energy of fastest photoelectron will be

Electron has energy of 100 eV what will be its wavelength &

Light of wavelength lambda strikes a photo - sensitive surface and electrons are ejected with kinetic energy is to be increased to 2 E , the wavelength must be changed to lambda' where

The work function of a certain metal is 2.3 eV. If light of wave number 2 xx 10^(6)m^(-1) falls on it, the kinetic energies of fastest and slowest ejected electron will be respectively.

Light of wavelength 3320 Å incidents on metal surface (work function = 1.07 eV ). To stop emission of photo electron, retarding potential required to be -

An electron moves in an electric field with a kinetic energy of 2.5 eV. What is the associated de Broglie wavelength?

Ultraviolet light of 6.2 eV falls on an aluminium surface (work function = 4.2 eV ). The kinetic energy (in joule) of the fastest electron emitted is approximately.