An inferior mirage is an optical phenomenon that occurs when layers of air at different temperatures create a distortion of light. This typically happens on hot days when the ground heats the air directly above it, causing the lower layer to be warmer than the air above. As light travels through these layers, it bends, making distant objects appear displaced or even inverted. Commonly seen on roads, an inferior mirage can make it look like there are puddles of water on the surface, even when none exist. This effect is often mistaken for actual water, leading to confusion for drivers and observers.