A metal whose work function is 2 eV is illuminated by light of wavelength `3 * 10^-7m`. Calculate threshold frequency

A metal whose work function is 2 eV is illuminated by light of wavelength 3 * 10^-7m . Calculate the stopping potential

A metal whose work function is 2 eV is illuminated by light of wavelength 3 * 10^-7m . Calculate maximum energy of photoelectrons

Electrons are emitted with zero velocity from a metal surface when it is exposed to radiation of wavelength 6800 overset@A . Calculate the threshold frequency (v_0) and work function (w_0) of the metal.