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Splitting of Sunlight

Which of the ...

Question

Which of the following is not involved in Rainbow formation?
(1) Refraction
(2) Internal Reflection
(3) Total Internal Reflection
(4) Dispersion

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Solution

Internal reflection is not involved in rainbow formation only TIR, refraction and dispersion cause rainbow formation.

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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. 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. 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. How may times total internal reflection occurs in the drop for formation of primary and secondary rainbows?

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Splitting of Sunlight

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