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Old 04-15-2016, 01:13 PM   #511 (permalink)
freebeard
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I'd always thought this was possible; probably from seeing this years ago and then forgetting the source.

https://en.wikipedia.org/wiki/Schlieren_photography


Quote:
Colour schlieren image of the thermal plume from a burning candle, disturbed by a breeze from the right.
The new develpment is that it has sprung from the confines of the wind tunnel, due to new image processing capabilities.


Quote:
Shock waves produced by a T-38 Talon during flight using analog background-oriented schlieren from the Sun's edge

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