WONDERS OF LIGHT PART II

Q1. Fill inthe blanks

Q2. Rewrite the following table in such a way thatcolumn 2 and column 3 matches column 1.

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.

2.       Explain how the formation of rainbow occurs.

3.       What isrefraction of light? How is it related to refractive index?

4.     Explain the propagation of a ray of light, when it travels from denser to rarer medium.

5.     Explain the propagation of a ray of light, when it travels from rarer to denser medium.

Q4. Give reasons.

1.       The sky appearsdark instead of blue to a person located in space.

2.       Stars twinkle atnight.

3.       The sun appearsreddish early in the morning.

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

1.       Refractionobserved in the atmosphere.

2.       Dispersion oflight. 

Q5. Define the following

Absolute refractive index.

Scattering of light.

Spectrum.

Dispersion of light.

Refractive index.

Refraction.