Physics (AS & A Level) · Oct / Nov 2023 · Paper 23 · Question 5

Two point sources, A and B, produce coherent electromagnetic waves. The waves from A and B are emitted in phase and have wavelength λ, as shown in Fig. 5.1. A λ B Fig. 5.1 (not to scale) The lines on Fig. 5.1 represent wavefronts. All the points on a wavefront are in phase.

Read automatically from the paper; the printed page above is exact.