Complete the sentence from the given options.
The tops of tall structures have red warning lights installed. These are easily seen from a distance because red light is:

see full answer

Your Exam Success, Personally Taken Care Of

1:1 expert mentors customize learning to your strength and weaknesses – so you score higher in school , IIT JEE and NEET entrance exams.

An Intiative by Sri Chaitanya

The one that is most dispersed by smoke or fog

The one that is most easily absorbed by smoke or fog.

The fastest in the air

Unaffected by smoke or fog.

answer is B.

(Unlock A.I Detailed Solution for FREE)

JEE

NEET

Foundation JEE

Foundation NEET

CBSE

Detailed Solution

Scattering of light is when a light ray is redirected in all other directions after passing through particles with dimensions comparable to the wavelength of the light used.
Red light has the longest wavelength of any visible light, it is scattered the least by smoke fog.
Because of their shorter wavelengths, blue, yellow, and green light scatter more effectively.
The red is the least deviated, while the violet is the most.
Therefore, danger signals installed on the tops of tall buildings are also red.

Watch 3-min video & get full concept clarity