Final answer:
High-beam headlights should not be used in foggy conditions as they create a glare and reduce visibility further. Low-beam headlights or fog lights are recommended for better visibility in fog.
Step-by-step explanation:
High-beam headlights are NOT a good tool to use when driving in fog. When high-beam headlights are used in fog, the light reflects off the water droplets in the fog and creates a glare, reducing visibility further and making it more difficult to see. This is because high-beam headlights produce a broad, dispersed beam of light that scatters and reflects off the fog particles, causing a phenomenon called the Tyndall effect.
On the other hand, low-beam headlights are designed to provide a more focused and downward-directed beam of light. This helps improve visibility in foggy conditions because the light is less likely to reflect back into the driver's eyes, allowing for better depth perception and clearer vision of the road and surrounding objects.
Therefore, it is recommended to use low-beam headlights or fog lights when driving in foggy conditions to maximize visibility and reduce the risk of accidents.