Vorticity (IMAGE) American Physical Society Caption The colors indicate vorticity, the whirling motion of the air around the baseball. Vorticity is not important, but red or blue indicators helps us see the wake.? Credit Barton Smith, Andrew Smith, John Garrett. Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.