Question 8
Which of the following statements is correct regarding the propagation of light of different colours of white light in air?

(a) Red light moves fastest
(b) Blue light moves faster than green light
(c) All the colours of the white light move with the same speed
(d) Yellow light moves with the mean speed as that of the red and the violet light

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Solution

Option (c) is correct
The speed of light in air/vacuum is constant and does not depend on characteristics of the wave (e.g. its frequency, polarization, etc). In other words, in air/vacuum the light of different colours of white light travel at the same speed.

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Similar questions

Q. Which of the following statement(s) is/are not correct regarding the propagation of light of different colours of white light in air?

Q. Scattering of light takes place as various colours of the white light travel with different speed in air.

Q. Which of the following coloured light has the least speed in glass prism?
(a) violet
(b) yellow
(c) red
(d) green

Q. Which of the following colour of white light has the least wavelength ?
(a) red (b) orange (c) violet (d) blue

Question 4
At noon the sun appears white as

(a) light is least scattered
(b) all the colours of the white light are scattered away
(c) blue colour is scattered the most
(d) red colour is scattered the most

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Dispersion of White Light by Glass Prism

Standard VIII Physics

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Option (c) is correct The speed of light in air/vacuum is constant and does not depend on characteristics of the wave (e.g. its frequency, polarization, etc). In other words, in air/vacuum the light of different colours of white light travel at the same speed.

Option (c) is correct
The speed of light in air/vacuum is constant and does not depend on characteristics of the wave (e.g. its frequency, polarization, etc). In other words, in air/vacuum the light of different colours of white light travel at the same speed.