What is refractive index: Learn about refraction in

Learn about refraction in physics. Get its definition and explore Snell's law and the index of refraction . Get examples for light and sound. What is Refractive Index : The refractive index (also denoted by the symbol 'n') of a material is a dimensionless number that represents how much light bends or refracts when it travels through that material compared to its speed in a vacuum. Refractive index is a measure of how light bends when it moves from one medium to another. Learn how to calculate it, how it relates to Snell's Law, and how it is used in various fields of science and technology.