Class 10 Light: Refraction, Lenses and Refractive Index
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Question
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A pencil standing in a glass of water looks bent at the water surface. What causes this?
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Answer
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Refraction of light as it passes from water into air
Light from the part of the pencil under water changes speed and direction as it leaves the water, so the submerged part appears raised and the pencil looks bent.
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