Q5 of 30 Page 86

Which of the following phenomena of light are involved in the formation of a rainbow?

Rainbow is formed due to the phenomena: Refraction, dispersion and internal reflection due to falling of sun light on rain droplets.

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3

A prism ABC (with BC as base) is placed in different orientations. A narrow beam of white light is incident on the prism as shown in Figure 11.1. In which of the following cases, after dispersion, the third colour from the top corresponds to the colour of the sky?

 4

At noon the sun appears white as

 6

Twinkling of stars is due to atmospheric

 7

The clear sky appears blue because