0
You visited us 0 times! Enjoying our articles? Unlock Full Access!
Question

# Why are red coloured lights are used in traffic signals to stop the vehicles?minimum wavelength and less scatter.less wavelength and less scatter.maximum wavelength and less scatter.maximum wavelength and more scatter.

A
maximum wavelength and more scatter.
B
less wavelength and less scatter.
C
minimum wavelength and less scatter.
D
maximum wavelength and less scatter.
Solution
Verified by Toppr

#### 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.

6
Similar Questions
Q1
In traffic signals _________ colour light is used to stop vehicles because it has ______ wave length. (Hint: scattering of light is inversely proportional to the fourth power of its wavelength)
View Solution
Q2
Why are red coloured lights are used in traffic signals to stop the vehicles?
View Solution
Q3
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.
View Solution
Q4
Light of wavelength 'λ' which is less than threshold wavelength is incident on a photosensitive material. If incident wavelength is decreased so that emitted photoelectrons are moving with same velocity then stopping potential will
View Solution
Q5

In the spectrum of white light, how many colours have a wavelength less than that of yellow colour?

View Solution