The work function of a photosensitive material is 2.eV. Calculate its threshold wavelength.

The work function of a metal is 3eV. Calculate its threshold wavelength.

The workfunction of a photosensitive surface is 3.3 eV. The 'Threshold frequecy in Hertz is

Two metals A and B have work functions 2eV and 4eV respectivey. which metal has lower threshold wavelength for photoelectric effect.

A photon has energy equal to 10^10 eV . Calculate its wavelength.