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Sahay Sir > Question Answers > Cengage JEE Mains Physics by B.M Sharma > Chapter 28 - Dual Nature of Radiation and Matter > The kinetic energy of most energetic electrons emitted from a metallic surface is doubled when the wavelength λ of the incident radiation is changed from 400 nm to 310 nm. The work function of the metal is

The kinetic energy of most energetic electrons emitted from a metallic surface is doubled when the wavelength λ of the incident radiation is changed from 400 nm to 310 nm. The work function of the metal is

If a surface has work function of 3.00 eV the longest wavelength of light which will cause the emission of electrons is