✅👇Snell's Law, also known as the law of refraction, explains how light changes direction as it passes through different materials. It was named after the Dutch scientist Willebrord Snellius (Snell), who first described it in 1621. The mathematical expression of Snell's Law is: n₁ * sin(θ₁) = n₂ * sin(θ₂) Here: - n₁ and n₂ are the refractive indices of the two materials. - θ₁ is the angle of incidence, measured between the incoming light ray and the normal (a line perpendicular to the surface) i
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When light moves from one material to another, like from air to glass and then into water, it bends at each surface because it changes speed. This bending is called refraction. Snell’s law tells us exactly how much the light will bend. Imagine someone running from a road onto sand at an angle. Their feet slow down in the sand, and their direction changes. Light does the same thing when it goes from one material to another. A glass of water works like a lens. Light from the arrows travels straigh
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