What is called refractive index?
GeneralClass 12AllAnswered 27 Mar 2026
Answer
Refractive index, also known as the index of refraction, is the optical property that quantifies how light behaves when entering a transparent material. It's called "refractive" because it relates to refraction—the phenomenon where light changes direction at the boundary between two different media. This fundamental property helps us understand everything from why a straw appears bent in water to how lenses in eyeglasses and cameras focus light.
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