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Light as a Form of Energy

Rainbow is pr...

Question

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.

A

II and III only

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B

I and II only

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C

I, II and III

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D

I and III only

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Solution

The correct option is C I, II and III
The formation of a rainbow involves a series of physical phenomena- reflection, refraction, dispersion and total internal reflection. The occurrence of each of these is due to the interaction of light with air and water and the boundaries between them.

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Similar questions

Q. Rainbow is produced when sunlight falls on drops of rain.
Which of the following physical phenomena are responsible for this?
1.Diffusion
2.Total Refraction
3.Internal reflection

Q. Question 3
Which of the following statements are correct?
(i) Sound is produced by vibrations.
(ii) Sound requires a medium for propagation.
(iii) Light and sound both require a medium for propagation.
(iv) Sound travels slower than light.

(a) i, ii and iv only
(b) i and ii only
(c) i, ii and iii only
(d) ii, iii and iv only

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. Question 3
Which of the following statements are correct?
(i) Sound is produced by vibrations.
(ii) Sound requires a medium for propagation.
(iii) Light and sound both require a medium for propagation.
(iv) Sound travels slower than light.

(a) i, ii and iv only
(b) i and ii only
(c) i, ii and iii only
(d) ii, iii and iv only

In the product $5 m a b$ ,

(i) $5$ is the numerical coefficient of $m a b$ .

(ii) the coefficient of $a b$ is $5 m$ .

(iii) $m$ , $a$ and $b$ are the only factors.

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