The traffic signals are red while the eyes are more sensitive to yellow because

Explanation

Red light has a longer wavelength compared to yellow light. Longer wavelengths tend to refract less when passing through mediums like the eye. This means that red light can more easily reach and stimulate the photoreceptor cells in the human eye, making it more visible. On the other hand, yellow light has a shorter wavelength compared to red light. This shorter wavelength causes more refraction when passing through the eye, making it less effective at stimulating the photoreceptor cells. As a result, red light is used in traffic signals to ensure that it can be easily seen, particularly in situations where visibility might be compromised or in low-light conditions.