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Light-Reflection and Refraction

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Motion class IX

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Refraction   is the bending of light (it also happens with sound, water and other waves) as it passes from one transparent   substance into another. This bending by refraction makes it possible for us to have lenses, magnifying glasses, prisms and rainbows. Even our eyes depend upon this bending of light. Without refraction, we wouldn’t be able to focus   light onto our   retina Rights: University of Waikato. All Rights Reserved."> Refraction By using the example of spearing a fish, Associate Professor Gordon Sanderson, an ophthalmologist from Otago University, explains the principle of refraction. Change of speed causes change of direction Light refracts whenever it travels at an angle into a substance with a different refractive index (optical density ). This change of direction is caused by a change in speed. For example, when light travels from air into water, it slows down, causing it to continue to travel at a different angle or directio...
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