Q.40. Which of the following Colour is least scattered by fog, dust and smoke ?
(A) Violet
(B) Blue
(C) Red
(D) Yellow

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Solution

Dear Student

Red color scatters the least by fog, dust or smoke as they have largest wavelength hence they are used for signal lights so that they can be visible in dense fog or smoke as well.

Regards

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Q. Which coloured light scatters least by fog and smoke?

Question 9
The danger signals installed at the top of tall buildings are red in colour. These can be easily seen from a distance because among all other colours, the red light:

(a) is scattered the most by smoke or fog
(b) is scattered the least by smoke or fog
(c) is absorbed the most by smoke or fog
(d) moves fastest in air

Q. The red colour of the sun at the time of sunrise and sunset is because:
(a) red colour is least scattered
(b) blue colour is least scattered
(c) red colour is most scattered
(d) blue colour is most scattered

Q. The signal light for danger is red in colour. Which of the following principle/ principles is/are used in it?

(P)

The red coloured light scatters least by fog or smoke.

(Q)

The wavelength of red coloured light is about

1.8

times more than that of blue.

A bean of blue, green and yellow light passes through the earth's atmosphere. Name the colour which is scattered (a) the least, (b) the most.

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Q.40. Which of the following Colour is least scattered by fog, dust and smoke ? (A) Violet (B) Blue (C) Red (D) Yellow

Dear Student Red color scatters the least by fog, dust or smoke as they have largest wavelength hence they are used for signal lights so that they can be visible in dense fog or smoke as well. Regards

Q.40. Which of the following Colour is least scattered by fog, dust and smoke ?
(A) Violet
(B) Blue
(C) Red
(D) Yellow

Dear Student

Red color scatters the least by fog, dust or smoke as they have largest wavelength hence they are used for signal lights so that they can be visible in dense fog or smoke as well.

Regards