Superposition in a snapshot
Superposition in a snapshot

Displacement is the signed distance from equilibrium at one instant, while amplitude is the maximum possible displacement.
Step-by-step lessons on Edexcel A Level Physics Superposition and stationary waves. Each one builds up to exam-style questions. Physics is one of the most mathematically demanding A Levels -- at least 40% of the marks across the three papers require maths skills at Level 2 (GCSE) standard or above, so build calculation and graph-handling fluency alongside the conceptual content from the start.