Made_to_Explain on Instagram: "Why do engineers choose yellow for fog lights? 🌧️ It comes down to the physics of light scattering. Standard white headlights contain shorter blue wavelengths, which hit water droplets in the fog and scatter right back at the driver—creating that dangerous "wall of white" glare (Rayleigh scattering). ​Yellow light has a longer wavelength, which penetrates the moisture in the air with significantly less scattering. This engineering choice improves contrast and allo