Light – Notes
Light – Refraction Basics
The tendency of light to bend at the point of separation of two media is called refraction.
The ratio of velocity of light in the first medium to that in the second medium is known as the refractive index of the second medium with respect to the first medium.
The ratio of velocity of light on air or vacuum to that in a medium is called the absolute refractive index (m) of the medium.
According to Snell’s law, the ratio between the values of the sine of angel of incidence and the sine of angle of refraction for two given optical media is constant.