Question

1. Red colour is used in danger signals.
a) As the scattering of red is less as its wavelength is more.
b) As its frequency is more.
c) As its wavelength is less.
d) Both b and c.​

Answer 1

Answer:

Since the color red has the highest wavelength of all the colors we can see it scattered the least. So, red light is used as a danger signal as it is able to travel the longest distance through the fog, rain, etc.

Explanation:

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Answer 2

Answer

a) As the scattering of red is less and it's wavelength is more.

Option b) c) and d) are incorrect because the wavelength of red light is more and frequency is less.

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Explanation

When a white light pass through prism then it divide into seven colours and wavelength of each colour is different. Wavelength of red light is more and frequency is less & wavelength of Violet is less and frequency is more.

Scattering of light for every colour is different. Less the scattering, more will be the distance covered by the light.

Wavelength of red is maximum among all the colours. So, it is least scattered by fog and dust particles. Therefore, it can cover the longer distance. That's why red colour is used in danger signals.