In the formation of a rainbow, the light...

In the formation of a rainbow, the light from the sun on water droples undergoes

dispersion only

only total internal reflection

dispersion and total internal reflection

none of these

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The correct Answer is:

A, B

Rainow is formed due to dispersion of sunlight by raindrops which also deviate the colours by total internal reflection.

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Phenomenon behind formation of rainbow.

The beautiful phenomenon of the rainbow is a combination of different phenomena - dispersion, internal reflection and refrection of light. The rainbow appears in the sky after a rainfall. The water droplets act as small prisms. When sunlight enters the water droplets present in teh atmosphere, they refract and disperse the incident Sunlight. Then, they reflect internally inside the droplet and finally again refract it. As a collective effect of all the phenomena, the seven coloured rainbow is observed. Q. Give a diagrammatic respresentation of Rainbow Production.

The beautiful phenomenon of the rainbow is a combination of dispersion, internal reflection and refraction of light. The rainbow appears in the sky after a rainfall. The water droplets act as small prisms. When sunlight enters the water droplets present in the atmosphere, they refract and disperse the incident Sunlight. Then, they reflect internally inside the droplet and finally again refract it. As a collective effect of all the phenomena, the seven coloured rainbow is observed. Q. Which three major phenomena are responsible for rainbow ?

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