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Grade: 10

                        

why is red light used as an indicator (it has something to do with scattering effect of light )

5 years ago

Answers : (6)

Abhinav
askIITians Faculty
387 Points
							White light is made up of 7 colors. Red colour, due to its longer wavelength does not get scattered by the particles in the atmosphere and hence reaches our eyes more distinctly than the other colors.
						
5 years ago
grenade
2061 Points
							
red light has longer wavelength and do not get scattered in the atmosphere (dust, dew, moisture)
this it the reason the reason that why red cross is red in colour
i is also used to give signals
approve if useful
5 years ago
Rahul Jiji George
42 Points
							
why doesnt it scatter?
5 years ago
Gman Namg
420 Points
							
if a light is having shorter wavelength then it is scatterd because of the sunlight partivles present in the atmosphere and thus for a light having longer wavelength should least scatter
 
approve if useful
5 years ago
Abhinav
askIITians Faculty
387 Points
							because wavelength comparable to size of particle of air scattred more.
						
5 years ago
shubham sharda
361 Points
							
The red light scatters the least because it has greatest wavelength and hence it travels the farthest . Thus red light is used as indicator.
5 years ago
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