Calculate the difference in energy in eV between the energy levels in the hydrogen atom that give rise to the red line in the spectrum.

\(E = \left( {\frac{{hc}}{\lambda } = } \right){\text{ }}3.03 \times {10^{ - 19}}{\text{ J}}\);

\( = 1.90{\text{ eV}}\);

Award [2] for bald correct answer.

The calculation in (b) was often correctly done.