An electron is moving with 3eV and is captured by proton to form H in second excited state. The resulting photon is radiated on a metal of threshold wavelength 4000 angstrom. Find kinetic energy of photoelectrons

An electron and proton are separated by a large distance. The electron starts approaching the proton with energy 3 eV. The proton captures the electrons and forms a hydrogen atom in second excited state. The resulting photon is incident on a photosensitive metal of threshold wavelength 4000Å What is the maximum kinetic energy of the emitted photoelectron?

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

The photoelctric effect work function for a metal is 4.2 eV. If the stopping potential is 3V, find the threshold wavelength and the maximum kinetic energy of emitted electrons.

A photon of frequency v is incident on a metal surface whose threshold frequency is v_(0) . The kinetic energy of the emitted photoelectrons will be

The de broglie wavelength of electron moving with kinetic energy of 144 eV is nearly

The work function of a metal is 4.0 eV . If the metal is irradiated with radiation of wavelength 200 nm, then the maximum kinetic energy of the photoelectrons would be about.

A glass tube has Be^(+++) ions excited to their second excited state. The radiation coming out of this tube is incident on a metal plate having work function f = 5 eV . Find the minimum de-Broglie wavelength of emitted photoelectrons.

Light of wavelenght 5000 Å fall on a metal surface of work function 1.9 eV Find a. The energy of photon b. The kinetic energy of photoelectrons

Electron in a hydrogen-like atom (Z = 3) make transition from the forth excited state to the third excited state and from the third excited state to the second excited state. The resulting radiations are incident potential for photoelectrons ejested by shorter wavelength is 3.95 e V . Calculate the work function of the metal and stopping potiential for the photoelectrons ejected by the longer wavelength.