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. Learn refractive index —definition, formula, values, and solved examples. Master this key Physics topic for exams with real-world applications and tips. What Is Refraction ? Refraction is the bending of a wave when it passes from one medium to another. The bending is caused due to the differences in density between the two substances. Defining Refraction “ Refraction is the change in the direction of a wave passing from one medium to another.” Refraction of light is one of the most commonly observed phenomena, but other waves like sound waves and water waves also experience refraction . Refraction makes it possible for us to have optical ...
