20 ms·
Wow! https://sciencedemonstrations.fas.harvard.edu/presentations/schlieren-optics https://sciencedemonstrations.fas.harvard.edu/presentations/...
by knightofmars 4y ago
Wow!
https://sciencedemonstrations.fas.harvard.edu/presentations/schlieren-optics https://sciencedemonstrations.fas.harvard.edu/presentations/...