Question
Explain the physical phenomena involved in the formation of a rainbow with a diagram
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Solution
A rainbow is a
natural spectrum appearing in the sky. It is caused by dispersion of sunlight
by tiny droplets present in the atmosphere after a rainfall. The tiny droplets
produce dispersion in the incident sunlight and then total internal reflection
and then refraction, as shown. Due to these phenomenon, different colours reach
the observer at different angles and a rainbow is formed
A rainbow is a natural spectrum appearing in the sky. It is caused by dispersion of sunlight by tiny droplets present in the atmosphere after a rainfall. The tiny droplets produce dispersion in the incident sunlight and then total internal reflection and then refraction, as shown. Due to these phenomenon, different colours reach the observer at different angles and a rainbow is formed
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