2019 CAIE AS & A level October November Physics Paper 13 Q. No. 29 (9702/13/O/N/19) by Sajit Chandra Shakya from Nepal Chapter - SUPERPOSITION OF WAVES The double-slit experiment demonstrates interference between two coherent sources of light waves. In the diagram, the curved lines represent wavefronts. At which point does complete destructive interference (a minimum) occur?