The Betz Limit is a theoretical maximum efficiency for wind turbines, established by German physicist Albert Betz in 1919. It states that no wind turbine can capture more than 59.3% of the kinetic energy in wind. This limit arises because a turbine must allow some wind to pass through to maintain flow and prevent a complete blockage. In practical terms, this means that while modern wind turbines can achieve efficiencies around 40-50%, they cannot exceed the Betz Limit. Understanding this limit helps engineers design more effective turbines and optimize energy production from wind, a key renewable energy source.