Question

Which expression gives the maximum kinetic energy of emitted photoelectrons?

Options

• \[K_{\max}=h\nu+\phi_0\]

• \[K_{\max}=h\nu-\phi_0\]

• \[K_{\max}=\phi_0-h\nu\]

• \[K_{\max}=h\nu\phi_0\]

Answer 1

The maximum kinetic energy is \[K_{\max}=h\nu-\phi_0\]. It is the photon energy remaining after the electron is removed from the surface.