Physics Class: Why Does a Straight Pencil Appear Bent in Water? Illusion or Science?

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Why does a straight pencil appear L-shaped in water? Unraveling the science of refraction!

$Science Behind Refraction of Light: रोचक उदाहरणों से फिजिक्स की दुनिया समझना आसान हो जाता है$

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News18•16-03-2026, 14:59

Why does a straight pencil appear L-shaped in water? Unraveling the science of refraction!

•A straight pencil appears bent or L-shaped in water due to a physics phenomenon called 'refraction'.
•Refraction is the bending of light rays when they pass from one medium (like air) to another (like water), changing speed and path.
•Water is denser than air; light slows down and bends upon entering water, then speeds up and bends again upon exiting.
•Our eyes and brain perceive light as traveling in a straight line, creating the optical illusion of a displaced or broken pencil.
•Other examples of refraction include a raised coin in water, a shallower-looking swimming pool, and the twinkling of stars.

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