Q2 of 8 Page 79

Prove the following statements.

A rainbow is the combined effect of the refraction, dispersion, and total internal reflection of light.

Rainbow is a natural spectrum appearing in the sky after a rain shower. It is formed due to combination of phenomenon like refraction, dispersion and total internal reflection of light. Water droplets act like small prisms which refract and disperse the incident sunlight. Then they reflect it internally and finally again refract it to form rainbow in the sky.



More from this chapter

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1

Fill in the blanks and Explain the completed sentences.

a. Refractive index depends on the ............. of light.


b. The change in ................ of light rays while going from one medium to another is called refraction.

 2

Prove the following statements.

If the angle of incidence and angle of emergence of a light ray falling on a glass slab are i and e respectively, prove that, i = e.

 3

Mark the correct answer in the following questions.

What is the reason for the twinkling of stars?

 3

Mark the correct answer in the following questions.

We can see the Sun even when it is little below the horizon because of