3 ms·
Related, a video about sound mirrors, used to detect aircraft in the 30's, by Tom Scott: https://youtu.be/04F5osXK4vw https://youtu.be/04F5osXK4vw
by nomel 4y ago
Related, a video about sound mirrors, used to detect aircraft in the 30's, by Tom Scott: https://youtu.be/04F5osXK4vw https://youtu.be/04F5osXK4vw