1.

(a) Draw a diagram to show the refraction of light through a glass prism. On this diagram, mark (i) incident ray (ii) emergent ray, and (iii) angle of deviation. (b) What is a rainbow ? What are the two conditions necessary for the formation of a rainbow in the sky ? (c) What acts as tiny prisms in the formation of a rainbow ? (d) Name the process which is involved in the formation of a rainbow. (e) What are the seven colours seen in a rainbow ?

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