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Superposition and coherent sources

Superposition and coherent sources

Interference happens when two waves overlap and combine by the principle of superposition. If the waves arrive in phase, their displacements add to give constructive interference; if a peak meets a trough, they cancel to give destructive interference.

Interference Lesson

  1. A Level
  2. /Physics
  3. /Interference

Step-by-step lessons on AQA A Level Physics Interference. Each one builds up to exam-style questions. Physics is one of the most mathematically demanding A Levels -- at least 40% of the marks require maths skills at Level 2 (GCSE) standard or above, so build calculation and graph-handling fluency alongside the conceptual content from the start.

Lessons