Shock Diamonds and Mach Disks Feature Summary

From Physics Research
Shock Diamonds and Mach Disks
When the speed of the gases in a jet or rocket exhaust exceeds the speed of sound, a dazzling pattern results called "shock diamonds" or "Mach disks," as shown in this photo of the SR-71 Blackbird. The diamonds are created by crisscrossing shock waves in the exhaust.

You can see shock diamonds in a static rocket test in this NASA video. For more information, check out Shock Diamonds and Mach Disks.
Image credit <a href=" http://" target="_blank">NASA</a>; <a href=" " target="_blank">Image source</a>; <a href="" target="_blank">larger image</a>
Image credit NASA; Image source; larger image
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June 16, 2010 - July 1, 2010