Refraction, Bending of light as it passes from one medium to another, Diffraction, Light spreading after passing through a narrow slit or around an edge, Reflection, Light bouncing off a surface, like a mirror, Glare, Uncomfortable brightness from sunlight or headlights, Directed light, Light focused in one direction, like from a flashlight, Reflected light, Light bouncing off a surface, like sunlight on water.

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