A photon of energy `4.5` eV strikes on a metal surface of work function `3.0 eV.` If uncertainty in position is `(25)/(4pi)Å,` find the uncertainty in measurment of deBroglie wavelength (inÅ ).

Two photons of energy 2.5 eV and 3.5 eV fall on a metal surface on work function 1.5 eV. The ratio of the maxium velocities of the photoelectrons emitted from the metal surface is

Will photoelectrons be emitted by a copper surface of work function 4.4eV when illuminated by visible light?

Photon having energy equivalent to the binding energy of 4^(th) state of He^+ atom is used to eject an electron from the metal surface of work function 1.4 eV. If electrons are further accelerated through the potential difference of 4V then the minimum value of De-broglie wavelength associated with the electron is :

Light of frequency 4 xx 10^(14)Hz is incident on a metal surface of work function 2.14 eV, resulting in photoemission of electrons. The maximum kinetic energy of the emitted electrons is [h = 6.63 xx 10^(-34)J-s]

A photon of energy E ejects a photoelectron from a metal surface whose work function is W_(0) .If this electon entres into a uniform magnetic field of induction B in a direction perpendicular to the field and describe a circular path of radius r, then the radius r is given by ,(in the usual notation)

A photon of energy 4 eV imparts all its energy to an electron that leaves a metal surface with 1.1 eV of kinetic energy. The work function of the metal is

When photons of energy 4.25 eV strike the surface of a metal A, the ejected photoelectrons have maximum kinetic energy, T_(A) (expressed in eV) and de Broglie wavelength lambda_(A) . The mximum kinetic energy of photoelectrons liberated from another metal B by photons of energy 4.20 eV is T_(B) = T_(A) - 1.50 eV . If the de Broglie wavelength of these photoelectrons is lambda_(B) = 2 lambda_(A) , then which is not correct :

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.