Question

What happens if photon energy is less than the work function?

Options

• The work function becomes equal to zero.

• The electron is emitted with kinetic energy.

• No electron is emitted.

• The photon is deflected by an electric field.

Answer 1

If photon energy is less than the work function, no electron is emitted. The photon does not provide enough energy to overcome the work function of the metal.