Refraction and Diffraction _ GCSE Physics

The video tutorial explains the concepts of refraction and diffraction. Refraction occurs when light passes through substances with different densities, causing a change in direction. The tutorial details how to measure angles of incidence and refraction. Diffraction is discussed as the spreading of waves when they pass through a gap, with examples including sound and light. The video also highlights how diffraction enables radio and microwaves to reach areas behind obstacles.

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