An electron in an excited state of a hydrogen atom transitions to a lower state, emitting a single photon of energy 3.0 × 10-19 J.
Which option correctly describes the change in the energy level of the electron and the region of the electromagnetic spectrum to which the emitted photon belongs?
(Planck constant h=6.63×10−34 J sh = 6.63 \times 10^{-34}\text{ J s}h=6.63×10−34 J s, speed of light in vacuum c=3.00×108 m s−1c = 3.00 \times 10^8\text{ m s}^{-1}c=3.00×108 m s−1)
Energy level of the electron decreases; Ultraviolet
Energy level of the electron decreases; Visible light
Energy level of the electron increases; Ultraviolet
Energy level of the electron increases; Visible light
32 exam-style questions on OCR GCSE Physics The electromagnetic spectrum. Each one has a worked solution and a mark scheme showing where the marks go.