2.3.39 - Wavefronts, coherence and interference

Know and understand what is meant by wavefront, coherence, path difference, superposition, interference and phase.

Use - wavefronts, coherence and interference to connect the rule to the data and decision in the question.

This matters because - wavefronts, coherence and interference determines what can be inferred or chosen; begin with the stated conditions and keep the conclusion tied to the evidence.

Example: apply - wavefronts, coherence and interference to one small, clearly defined case, show the key step or comparison, and explain the result in words.

Boundary: - Wavefronts, coherence and interference is not a universal recommendation. Check the syllabus scope, assumptions, units and the limits of the evidence before generalising.