3 ms·
I don't know what they're doing in a bath, but small radar systems have been used as proximity fuses for anti-aircraft shells since WWII.
by mcguire 7y ago
I don't know what they're doing in a bath, but small radar systems have been used as proximity fuses for anti-aircraft shells since WWII.
- blattimwind 7y agoAs light switches and such; PIR sensors don't really work in a shower room, for example.