In cricket, what is a "reverse swing"?
VerifiedAnswer: A late, exaggerated swing of an old ball in the opposite direction to conventional swing, caused by differential air pressure on its worn and shiny sides.
Explanation:
Reverse swing is one of cricket's most fascinating and challenging bowling techniques. Unlike conventional swing that occurs with a new ball, reverse swing happens with an old ball that has been used for at least 35-40 overs. The magic lies in how the ball's condition changes over time during a match.
In conventional swing, a new ball with one shiny side and one rough side swings towards the rough side due to air resistance. However, with reverse swing, something completely opposite happens. When the ball becomes very old and worn, it swings towards the shiny side instead. This unexpected movement can surprise even the most experienced batsmen.
The science behind reverse swing involves complex aerodynamics. As the ball ages, the rough side becomes extremely rough while one side remains relatively smooth through constant polishing by players. When bowled at high speeds (usually above 85 mph), the airflow separates differently on each side. The rough side creates more turbulent airflow, which paradoxically reduces drag, causing the ball to move toward the smoother side.
Pakistani fast bowlers like Wasim Akram and Waqar Younis were legendary masters of reverse swing in the 1990s. They could make the old ball swing dramatically late in its trajectory, making it nearly impossible for batsmen to predict which way the ball would move. This late movement is what makes reverse swing so dangerous and effective.
Modern fast bowlers from various countries have mastered this art, including England's James Anderson and Australia's Mitchell Starc. The key factors for successful reverse swing include maintaining one side of the ball in good condition, bowling at high speeds, and perfect seam position. The technique requires years of practice and deep understanding of ball maintenance throughout an innings.
