a) State and explain the laws of refraction of light with the help of a labelled diagram. b) What is meant by the refractive index of a substance? c) Light travels through air at 300 million ms^(-1). On entering water it slows down to 225 million ms^(-1). Calculate the refractive index of water.

a) State and explain the laws of refraction of light with the help of

1.	a) State and explain the laws of refraction of light with the help of a labelled diagram. b) What is meant by the refractive index of a substance? c) Light travels through air at 300 million ms^(-1). On entering water it slows down to 225 million ms^(-1). Calculate the refractive index of water.
Answer» SOLUTION :`1.24 xx 10^(8)ms^(-1)`