A hydrogen discharge tube emits a prominent blue-green spectral line with a wavelength of 486 nm486\text{ nm}486 nm.
Calculate, in eV\text{eV}eV, the change in the energy level of the hydrogen atom that is responsible for the emission of a photon of this wavelength.
Explain, with reference to the physical processes within the atom, the difference between how this emission line is produced compared to an absorption line of the same wavelength.
31 exam-style questions on AQA A Level Physics Electromagnetic radiation and quantum phenomena, covering The photoelectric effect, Collisions of electrons with atoms, Energy levels and photon emission, and Wave-particle duality. Each one has a worked solution and a mark scheme showing where the marks go.