Because you use light to communicate in sign language, and light is just an electromagnetic wave like radio but on another frequency. You just need to be in line of sight
Because you use light to communicate in sign language, and light is just an electromagnetic wave like radio but on another frequency. You just need to be in line of sight
Really, radio communication is about creating and transmitting those radio waves. Sign language relies on reflected light waves so it’s actually a form of RADAR 😀
Ok, but technically, it would actually be more like LIDAR, since we use visible light rather than radio waves
Alas, RADAR relies on transmitting and then reading the reflected waves.
RADAR: RA(dio) D(etection) A(nd) R(anging)
It doesn’t rely on self transmission. It can but you can detect and range other sources without generating it yourself.
That’s just what the acronym means, it doesn’t describes the actual process. I don’t think there is a single RADAR that doesn’t have a transmitter. At that point it would just be a… radio.
Passive radar?
I’ll have what you and OP are having.
what if i attach light bulbs to my hands