radio, cell phones
The monitoring device is a radio transmitter that sends signals to the radio transmitter. Radio waves are a type of Electromagnetic waves.
We send satellites and space probes equipped with cameras into space. The satellites and probes can be sent commands via radio waves, and the equipment then sends back digital photographs via radio as well.
A radio sends its electromagnetic waves into the ionosphere where they bounce back to earth.
A cellular phone is basically a radio that sends signals on waves to a base station, so yeah, radio waves are dangerous to living organisms as well.
Radio Telescopes.. :)
Radio - Astronomy
A radio telescope.
Radio waves are often referred to as space waves because they have the ability to move through space. Radio waves are a type of electromagnetic radiation.
Radio waves travel through empty space because they are electromagnetic waves, whereas sound is a wave that must travel through air.
Radio Waves! (:
yes they can
with radio waves
Radio waves and light waves.
Huge, dish shaped radio telescopes pick up radio waves from space. The dish gathers the signals and reflect them onto an aerial. The aerial sends electrical signals to a receiver, then to a computer, which converts them into a false-colour radio picture.
You may be thinking of weather RADAR. It sends out radio waves, some of them bounce off of rain, snow, or the boundaries of layers in the atmosphere, and the radar receiver detects the waves that bounce off of something and come back.
A radio telescope