Photoelectrons are liberated by ultra light of wavelength `2000 Å` from a metallic surface for which the photoelectric threshold is 4000Å. Calculate the de Broglie wavelenth of electrons emitted with maximum kinetic energy.

Photo electrons are liberated by ultraviolet light of wavelength 3000 Å from a metalic surface for which the photoelectric threshold wavelength is 4000 Å . Calculate the de Broglie wavelength of electrons emitted with maximum kinetic energy.

Photo electrons are liberated by ultraviolet light of wavelength 3000 Å from a metalic surface for which the photoelectric threshold wavelength is 4000 Å . Calculate the de Broglie wavelength of electrons emitted with maximum kinetic energy.

Photoelectron are liberated by altra voilet light of wavelength 3000Å from a metallic surface for which the photoelectron thershold is 4000 Å calculate de broglic wavelength of electron with maximum kinetic energy

Photoelectron are liberated by altra voilet light of wavelength 3000Å from a metallic surface for which the photoelectron thershold is 4000 Å calculate de broglic wavelength of electron with maximum kinetic energy

Light of wavelength 4000 Å is incident on a sodium surface for which the threshold wavelength of photoelectrons is 5420 Å. The work function of sodium is

Light of wavelength 5000 Å falls on a sensitive plate with photoelectric work function of 1.9 eV . The kinetic energy of the photoelectron emitted will be