Can be used to carry messages such as mobile phone texts and CV radios
One uses infrared light and the other uses radio waves. Hope this helps!
No. As you might guess from the name, radar uses radio waves. Radio waves, in turn, are a type of electromagnetic wave - in other words, in principle similar to light waves.
it doesn't, it uses microwaves
"Radar" comes from RAdio Detection And Ranging. If it didn't use radio it would be called something else.LIDAR (LIght Detection And Ranging) is laser instead of radio. That uses light.
bluetooth is an open wireless protocol for exchanging data over short distances. it uses short length radio frequencies. bluetooth uses a radio technology called frequency-hoping spread spectrum.
it uses radio waves
1930
Yes. A good rule of thumb is that if the device has an antenna, it uses radio waves. An antenna would not be needed if it didn't use radio waves.
RADAR (RAdio Detection And Ranging)
it could promote artists
Wireless.
Radar uses radio waves.