(i) Explain the statement: "Work function of a certain metal is 2.0 eV."
(ii) Calculate the maximum wavelength of the electro-magnetic radiation which will cause emission of photoelectrons from this metal.

(a) Calculate KE of photoelectron emiited from sodium surface when light of wavelength 400nm is incident on it (Work function of sodium =2.28eV ). (b) Calculate maximum wavelength (threshold wavelength) that can cause emission of photoelectron from sodim surface.

The work function of metal is W and lamda is the wavelength of the incident radiation. There is no emission of photoelecrons when

Which of the following metal requires radiation of highest frequency to cause emission of electrons?

Work function of a metal is 3.0 eV. It is illuminated by a light of wavelength 3 xx 10^(-7) m. Calculate the maximum energy of the electron.

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

Which of the following metal requires radiation of the lowest wavelength to cause emission of electrons?

The work function of a metal is 4.2 eV , its threshold wavelength 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 substance is 12.4 eV. The longest wavelength of light that can cause photoelectron emission from this substance is approximately

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: