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✅👇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