When radiation of wavelength 253.7nm falls on a copper surface, electrons are ejected. Calculate work function if the stopping potential is 0.5 V.

Light of wavelength 2000 Å falls on a metallic surface whose work function is 4.21 eV. Calculate the stopping potential

Light of wavelength 250 nm falls on a photosensitive material with work function 3 eV. Find the stopping potential for this material.

Metal surface emits photoelectrons when light of wavelength 400 nm is incident on it. Calculate the work function of the metal if stopping potential is 0.5 V.

Electromagnetic radiations of wavelength 2000Å are incident on a metal surface which has a work function 5.01 eV The stopping potential for the given setup is

A photon of energy 12 V falls on metal surface whose work function is 4.15 eV . The stopping potential is

The radiation of wavelength 332 nm is incident on a metal of work function 1.70 eV. The value of the stopping potential will be

A surface has light of wavelength lamda_1=550nm incident on it, causeing the ejection of photoelectrons for which the shopping potential is V_(s1)=0.19V . If the radiation of wavelength lamda_2=190nm is now incident on the surface, (a) calculate the stopping potential V_(s2) , (b) the work function of the surface, and (c) the threshold frequency for the surface.

Radiation of wavelength 546 nm falls on a photo cathode and electrons with maximum kinetic energy of 0.18 eV are emitted. When radiation of wavelength 185 nm falls on the same surface, a (negative) stopping potential of 4.6 V has to be applied to the collector cathode to reduce the photoelectric current to zero. Then, the ratio (h)/(e) is

Calcium plate has maximum possible radiation of wavelength 1 of 400 nm to eject electrons . It’s work function is