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Dispersion of White Light

Formation of ...

Question

Formation of a rainbow is primarily due to ___.

A

reflection

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B

refraction

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C

deviation

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D

dispersion

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Solution

The correct option is D
dispersion

Rainbows are formed primarily due to dispersion of white light. When white light from Sun enters into a raindrop, it gets dispersed into it's constituent colours similar to a prism. These colours form the rainbow.

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Similar questions

Q. Question 5
Which of the following phenomena of light are involved in the formation of a rainbow?

(a) Reflection, refraction and dispersion
(b) Refraction, dispersion and total internal reflection
(c) Refraction, dispersion and internal reflection
(d) Dispersion, scattering and total internal reflection

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. 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. Only refraction and dispersion of light take place in the formation of a rainbow.

Q. The twinkling of stars is due to atmospheric :
(a) reflection of light (b) dispersion of light
(c) interference of light (d) refraction of light

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