Why are red coloured lights are used in traffic signals to stop the vehicles?

Question

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Answer 1

We know among the seven colours of white light, red colour has maximum wavelength. That is why red colour is least scattered by atmospheric dust and other particles. Hence red colour is used to indicated any danger sign.

Answer 2

We know among the seven colours of white light, red colour has maximum wavelength. That is why red colour is least scattered by atmospheric dust and other particles. Hence red colour is used to indicated any danger sign.

Why are red coloured lights are used in traffic signals to stop the vehicles?

minimum wavelength and less scatter.

maximum wavelength and more scatter.

maximum wavelength and less scatter.

less wavelength and less scatter.

We know among the seven colours of white light, red colour has maximum wavelength. That is why red colour is least scattered by atmospheric dust and other particles. Hence red colour is used to indicated any danger sign.

The red colour of sun during sunrise and sunset is due to _____________ of light.

Which coloured light scatters least by fog and smoke?

Red light is used as danger signal because it is:

Which colour of light is scattered the most (maximum) in the atmosphere?

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:

Revise with Concepts

Scattering of Light