Consequences of Refraction of Light
Coin and pencil · Twinkling stars · Early sunrise
Why a hidden coin reappears in water
Why a pencil looks bent and water looks shallow
Why stars twinkle but planets do not
Why we see the sun before sunrise and after sunset
Water to air: light bends away from the normal
Air to water: light bends towards the normal
Bent light makes the object appear in a false place
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