Analysis of information sources in references of the Wikipedia article "Magnus effect" in English language version.
...if a streamline is curved, there must be a pressure gradient across the streamline
...if a streamline is curved, there must be a pressure gradient across the streamline
Lift occurs when a moving flow of gas is turned by a solid object. The flow is turned in one direction, and the lift is generated in the opposite direction, according to Newton's Third Law of action and reaction.