Physics 7408/3BD June 2018

The AQA Paper 3 Physics exam (June 2018), Section B (Turning points in physics), covers fundamental physics concepts related to the electron, electromagnetic waves, the photoelectric effect, and special relativity. The paper begins with the determination of the electron′s specific charge using data from a cathode ray tube, followed by a discussion on Thomson′s results. It also explores Maxwell′s equations, the detection of electromagnetic waves, and the properties of the photoelectric effect, including the calculation of wavelength and discussion of the classical versus photon models. The section delves into the Michelson-Morley experiment, which tested the concept of the ether, and concludes with experimental evidence supporting Einstein′s theory of special relativity, including length contraction and the decay of muons.