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.

The work function of a metal is 4.2 eV . If radiation of 2000 Å fall on the metal then the kinetic energy of the fastest photoelectron is

The work function of a metal is 4.2eV. If the radiation of 2000Å falls on the metal, find the kinetic energy of the metal

The work function of a metal is 4.2 eV. IF the radiation of 2000 Å falls on the metal, find the kinetic energy of the metal.

The work function of a metal is 3.4 eV. A light of wavelength 3000Å is incident on it. The maximum kinetic energy of the ejected electron will be :

The work function of a metal is 3.4 eV. A light of wavelength 3000Å is incident on it. The maximum kinetic energy of the ejected electron will be :

The work function of a metal is 4.2 eV If radiation of 2000 Å fall on the metal then the kinetic energy of the fastest photoelectrn is

The work function of a metal is 2.4 eV. If radiations of 3000 A^o on the metal, then the kinetic energy of the fastest photoelectron is:

The work function of a metal is 2.4 eV. If radiations of 4000 A^o on the metal, then the kinetic energy of the fastest photoelectron is:

The photoelectric work - function of potassium is 2.3 eV. If light having a wavelength of 2800 Å falls on potassium, find (a) the kinetic energy in electron volts of the most energetic electrons ejected. (b) the stopping potential in volts.