How does an inversion typically affect visibility?

An inversion, which occurs when a layer of warm air traps cooler air below it, typically affects visibility by trapping haze, fog, or smog near the surface. Inversions can create a stable atmosphere that prevents vertical mixing of air, which is essential for dispersing pollutants. As a result, any moisture or particulate matter that is present in the cooler air can accumulate and lead to reduced visibility conditions. This phenomenon is particularly common in urban areas or regions with high levels of air pollution, where the buildup of these particles can significantly impair visibility.

The other options don't accurately describe the impact of an inversion on visibility. While it might seem that inversions could improve visibility due to more stable conditions, the reality is that the trapping effect often leads to poorer visibility rather than enhancing it. Inversions do not cause widespread thunderstorms; these are typically associated with unstable air masses and favorable lifting conditions. Lastly, from an atmospheric perspective, inversions have a profound impact on visibility, making the notion that they have no impact quite misleading.