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3.3.1 Progressive and Stationary Waves
3.3.2 Refraction, Diffraction and Interference
Interference - The interaction of two or more waves
The Double Slit - Young's famous experiment that produces an interference pattern
Diffraction Gratings - Plane transmission gratings and the pattern these produce
Refraction - The changing direction of a wave as it crosses a boundary
Total Internal Reflection - TIR as a wave travels towards a different medium
Optical Fibres - These allow the modern digital world to communicate at light speed
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