2007-12-12 08:39:28 · 5 answers · asked by DaYrØn™ 2 in Science & Mathematics ➔ Physics
While some early remote controls used sound waves, most modern remote controls use infrared light emitting diodes (LED's) to transmit the digital signals indicating instructions like "volume up" or "power on".
Infrared radiation is simply light with a frequency slightly lower than red light and invisible to the human eye. Like all light (or electromagnetic radiation), it is a wave in both the electric and magnetic field. Although, the changes in magnetic field due to infrared radiation are very minute, significantly weaker than even the magnetic field of the earth.
2007-12-12 08:46:08 · answer #1 · answered by Anthony Scodary 1 · 0⤊ 0⤋
I saw a great demo last year that used a video camera to actually show the infrared 'light' that comes out of the remote control. I guess the detector in the camera is quite sensitive to IR. It was easy to see the flashes the remote control put out as well as reflections off the wall and other things. Well worth a try!
2007-12-12 16:00:50 · answer #2 · answered by Steve H 5 · 0⤊ 0⤋
Most remote controls operate on infrared. There is no such thing as a "magnetic wave." Infrared radiation is electromagnetic, just like radio waves and visible light.
2007-12-12 08:43:09 · answer #3 · answered by ZikZak 6 · 0⤊ 0⤋
Radio transmitters transmit radio waves, which are low-frequency photons, which are a self-sustaining combination of an electric and a magnetic wave.
In other words, yes.
2007-12-12 08:43:21 · answer #4 · answered by lithiumdeuteride 7 · 1⤊ 0⤋
They operate with heat
from a Infra red LED (Light emitting diode)
pulses of infra red energy to an infra red receiver
in the tv , dvd, etc
2007-12-12 08:46:55 · answer #5 · answered by Anonymous · 0⤊ 0⤋