Why does a cricket ball reverse swings in the air?

A cricket ball reverses swing due to the asymmetrical wear on its surface. When one side of the ball is polished and shiny while the other side is rough, the airflow around the ball becomes uneven. As it travels through the air, the polished side creates less turbulence, allowing the ball to maintain a straighter path, while the rough side causes more turbulence, leading to a swing in the opposite direction. This effect is more pronounced at higher speeds and with older balls.