The observation of ring-like diffraction patterns when a beam of high-speed electrons passes through a thin polycrystalline metal foil provides direct experimental evidence for which of the following?
Atoms consist of a small, dense nucleus containing most of the atomic mass.
Moving electrons can exhibit wave-like behavior.
Electric charge is quantized in discrete packets.
Electromagnetic radiation behaves as particles during its propagation.
26 exam-style questions on OCR A A Level Physics Quantum physics, covering Photons, The photoelectric effect, and Wave–particle duality. Each one has a worked solution and a mark scheme showing where the marks go.