What is refraction?

Refraction is the bending of light as it goes from one medium to another. The most common use of refraction is in lenses. Eyeglass lenses refract light so that the wearer’s eyes can focus the light properly. A magnifying glass is used to see enlarged images. Lenses in cameras produce an image on the film or CCD sensor. Refraction also occurs when sunlight strikes Earth’s atmosphere and when it goes through water.


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