Physics
How is the refractive index of a medium related to the speed of light in it and in vacuum or air?
Related Questions
Define the term refractive index of a medium. Can it be less than 1?
Compare the speeds of light of wavelength 4000Å (i.e. violet light) and 8000Å (i.e. red light) in vacuum.
A light ray in passing from water to a medium (a) speeds up (b) slows down. In each case, (i) give one example of the medium, (ii) state whether the refractive index of medium is equal to, less than or greater than the refractive index of water.
What do you understand by the statement 'the refractive index of glass is 1.5 for white light'?