Question: Q. 5. Write the conditions for observing a rainbow. Show, by drawing suitable diagrams, how one understands the formation of a rainbow.
[O.D. Comptt. I, II, III 2014]
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Solution:
Ans. The condifions for observing a rainbow are :
(i) The surcomes out after a rainfall.
$1 / 2$
(ii) Theoobserver stands with the sun towards his/her back Formation of a rainbow :
(Any one) $1 / 2$
a) The rays of light reach the observer through a refraction, followed by a reflection and a refraction.
(b) Figure shows red light, from drop 1 and violet light from drop 2, reaching the observer’s eye.
[CBSE Marking Scheme 2014]
