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.

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

To emit a free electron from a metal surface a minimum amount of energy must be supplied.When light of frequency 7.21 * 10^14 Hz is incident on a metal surface, the maximum speed of the ejected electrons is 6 x 10^5 m/s . Calculate the threshold frequency for the metal.

Photons of frequency, v, fall on metal surface for which the threshold frequency is v_(0) . Then

Explain with reason: Green light emit electron from certain metal surface while yellow light does not