Question

Which photoelectric equation gives the maximum kinetic energy of an emitted electron?

Options

• \[K_{\max}=h\nu+\phi\]

• \[K_{\max}=h\nu\phi\]

• \[K_{\max}=h\nu-\phi\]

• \[K_{\max}=\phi-h\nu\]

Answer 1

The photoelectric equation is \[K_{\max}=h\nu-\phi\]. It subtracts the metal’s work function from the photon energy to give the maximum kinetic energy.