What is the role of the phosphor coating on the inner surface of a fluorescent tube?
It absorbs ultraviolet (UV) photons and emits visible light.
It absorbs visible light and emits ultraviolet (UV) photons.
It emits ultraviolet (UV) photons when collided with by fast-moving electrons.
It releases free electrons to sustain the electric discharge through the gas.
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.