Final answer:
To see better while driving in fog, use low beam headlights to reduce light reflection and increase visibility. High beams can make conditions worse by reflecting off the fog and creating glare. Properly using lights during low-visibility conditions is crucial for safety.
Step-by-step explanation:
When driving in fog, it's essential to use your car's headlights appropriately to improve visibility. While it might be instinctive to use high beams, these can actually reflect off the fog and create a 'white wall' effect that further reduces visibility. Instead, you should switch to low beams or fog lights if your vehicle is equipped with them. This is because low beams point downward, reducing the amount of light that is reflected back by the fog and making it easier to see the road ahead. Fog is akin to a thin, dispersed cloud at ground level, which scatters light. As with a smoggy day in a big city, where clarity improves when there's no smog, in fog conditions, you want to minimize the amount of scattered light to see things clearly.
In terms of car electrical systems, like the scenario where you notice the refrigerator light dim or the passenger compartment light dim when you start your car's engine, these observations relate to electrical load and resistance. The starting of a car engine draws a significant amount of current, causing a temporary drop in voltage supplied to other electrical components, which is why lights dim momentarily.