Image: Eureka Prize: Gas Flow Visualisation Using RGB Schlieren System
For promotion of New Scientist Eureka Prize for Science Photography only.
- Wayne Baker
- © Wayne Baker
Changes in refractive index visualised using a red-green-blue z-type schlieren system. Used by technicians everywhere to blow dust from circuit boards, compressed 'air in a can' is invisible to the human eye. When viewed using the schlieren system, the gases used are of a different refractive index to the surrounding air, allowing us to see the gas flow that would normally be invisible. Schlieren images are normally monotone, but with the use of a tri-colour filter the image becomes coloured, adding aesthetic elements and giving insight into what direction light rays are being refracted by the gas.