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.

What happens to light rays when they pass across the boundary between two substances with different densities?

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Explain the concept of refraction and how it affects the direction of light rays.

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What is the relationship between the angle of incidence and the angle of refraction?

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Describe the phenomenon of diffraction and how it differs from refraction.

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How does the width of a gap affect the diffraction of waves?

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