Electrons are emitted with zero velocity from a metal surface when it is exposed to radiation of wavelength ` 6800` Å . Calculate threshold frequency `( v_0)` and work function `(W_0)` of the metal.

Electrons are emitted with zero velocity from a metal surface when it is exposed to radiation of wavelength 6800 Å. Calculate threshold frequency (V_(0)) and work function (W_(0)) of metal.

Electrons are emitted with zero velocity from a metal surface when it is exposed to radiation of wavelength 6800A . Calculate threshold frequency (V_(0)) and work function (W_(0)) of the metal.

Electrons are emittes with zero velocity from a metal surface when it is exposed to radiation of wavelength 6800A^@ . Calculate threshold frequency (nu_0) and a work function (W_0) of the metal.

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.

Electrons ar emitted with zero velocity from a metal surface when it is exposed to radiation of wavelength 6800 A^(@). Calculate threshold frequency (v _(0)) and work function (w) of the metal.

Electrons are emitted with zero velocity from a metal surface when it is exposed to radiation of wavelength 4000Å . What is the threshold frequency (upsilon_(0)) ?