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Dispersion of White Light

Rainbow is ca...

Question

Rainbow is caused due to:

A

Reflection of sun light in air

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B

Dispersion of sun light from water drops

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C

Multiple reflections of sunlight from water drops

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D

Refraction of sun rays from water drops

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Solution

The correct option is B
Dispersion of sun light from water drops

The phenomenon of the splitting up of white light into its component colours is dispersion. It occurs because different colours in white light undergo different extents of refraction. Dispersion of sunlight occurs when white light breaks into its component spectrum of colours as it passes through the rain drops. This natural phenomenon forms a Rainbow.

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Q. Assertion :The rainbow is an example of the dispersion of sunlight by the water drops in the atmosphere. Reason: No reflection or refraction of light is involved in the formation of rainbow.

Q. Rainbow is produced when sunlight falls on drops of rains. Which of the following physical phenomena are responsible for this?
(I). Dispersion
(II). Refraction
(III). Internal Reflection.

Q. Sun in orange colour but rainbow is caused by dispersion so the white light produced from sun should be in white and the sun also should be in white colour

Q. Which of the following statement(s) is/are incorrect about rainbow?
(i) Violet colour is at the top and red is at the bottom of rainbow.
(ii) For observing rainbow, observer should face towards the Sun.
(iii) Only dispersion of light takes place during rainbow formation.
(iv) All three i.e reflection, refraction and dispersion takes place during rainbow formation.

Q. In the formation of rainbow, light from the sun in the water droplets undergoes :

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