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J & K CETJ & K CET 2006Ray Optics and Optical Instruments
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Solution:
The rainbow is seen as a virtual image in the form of a coloured arc centered on the anti-solar point that is the point below the horizon, directly opposite the sun in the sky. When conditions are favourable two rainbows are seen the brighter is the primary and a fainter second one with the colours reversed. Hence, both primary and secondary rainbow are virtual images.