What do you understand by refraction of light. Draw the labelled ray diagram, when ray passes through glass slab.
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1
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Refraction is bending of light ray when light enters from one medium to another .it depends on optical density of the medium .it has no SI unit.
Diagram u will get in NCERT BOOK.
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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
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