Q3. Answer the followings.
1. What do you mean by dispersion? Name the different colours of light inthe proper sequence in the spectrum of light.
3. What isrefraction of light? How is it related to refractive index?
Q4. Give reasons.
4. It is possibleto enjoy a rainbow at fountains in any season.
5. Planets do not twinkle.Planets do not twinkle.
Q5. Write short notes on