Question

Danger signals are red while the eye is more sensitive to yellow because

Answer 1

Answer:

danger signals are given in red light because red light has the the highest wavelength and hence does not undergo scattering while travelling through the the medium and can reach the observers eyes.

Answer 2

Answer:

$In the spectrum of white light, red has the highest wavelength, and hence is scattered the least by the atmospheric particles. ... For this reason, danger signals are red despite the fact that the human eye is most sensitive to yellowand green.$