The conditions for observing a rainbow are :
(i) The sun comes out after a rainfall.
(ii) The observer stands with the sun towards his/her
back, (any one)
Formation of a rainbow :
The rays of light reach the observer through a refraction, followed bv a reflection and a refraction.
Figure shows red light, from drop 1 and voilet light from drop 2, reaching the observers eye.
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