Focusing Shock : 2007

Photograph by

Harald Kleine

About this image

School of Engineering and Information Technology, University of New South Wales / Australian Defence Force Academy, Canberra, ACT 2600, Australia. Interferometry image of the complex patterns created by a reflected shockwave. The shockwave has travelled down a shock tube from the top of the image to hit a cylindrical reflector at the bottom. Parts of the shock wave collide producing huge pressure variations, witnessed by the close-packed colour fringes. The image was created by illuminating the shock tube with a flash gun, the light passing through then hits an interference plate, and was captured using a high-speed video camera with an exposure time of 0.6 microseconds.