Why matter can behave like a wave
Why matter can behave like a wave
Light can behave like a stream of particles called photons. De Broglie suggested the reverse idea: a moving particle can also have a wave associated with it.
Step-by-step lessons on AQA A Level Physics Wave-particle duality (A-level only). 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.