= Schlieren Flow Visualization (NASA Glenn Research Center)
{c}
{title2=updated 2021-05-13}
Online text: https://www.grc.nasa.gov/WWW/K-12/airplane/tunvschlrn.html
Issued and hosted by <NASA Glenn Research Center>. The footer credits <Nancy Hall> as editor and NASA official; no individual author byline is established. Last updated 13 May 2021, an online revision date.
Cited passages: slit source, two concave mirrors, knife edge and recording device; density-gradient contrast; dimensional interpretation.
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