Why is red light employed for danger signals?

Red colour is smothing to the eyes

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Human eye is most sensitive to red colour

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Red light is scattered least

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Red light is scattered most

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Solution

The correct option is C Red light is scattered least
Red light has the highest wavelength among the visible light and so it scatters the least. Due to least scattering of red light, it can be seen even from a large distance or even through fog and so we can see it clearly.

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Similar questions

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

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 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.

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Why is red light employed for danger signals?

The correct option is C Red light is scattered leastRed light has the highest wavelength among the visible light and so it scatters the least. Due to least scattering of red light, it can be seen even from a large distance or even through fog and so we can see it clearly.

The correct option is C Red light is scattered least
Red light has the highest wavelength among the visible light and so it scatters the least. Due to least scattering of red light, it can be seen even from a large distance or even through fog and so we can see it clearly.