Physics

Problem

Monochromatic light of wavelength

80\,\text{nm}

is incident on hydrogen atoms in the ground state and photoelectrons are ejected. What is the kinetic energy of the emitted electron? (Use

h = 6.63\times10^{-34}\,\text{J\,s}

c = 3.0\times10^{8}\,\text{m\,s}^{-1}

1\,\text{eV}=1.6\times10^{-19}\,\text{J}

and ground-state ionisation energy

=13.6\,\text{eV}

.) a)

5.3\ \text{eV}

15.5\ \text{eV}

1.9\ \text{eV}

3.4\ \text{eV}