Any other demos that can be done with these remotes?
The IR output of TV,etc remotes can be viewed and photographed with many
digital cameras.
(The typical camera CCD will respond to IR, but some cameras include a
filter in order to exclude IR “light”.)
From: Anthony Lapinski
Sent: Friday, November 04, 2011 3:43 PM
To: tap-l@lists.ncsu.edu ; phys-l@carnot.physics.buffalo.edu
Subject: [Phys-l] remotes
I'm teaching about EM waves in astronomy and atmospheric absorption. I use
a remote control, solar cell, and Radio Shack amp/speaker to show that
remotes give IR pulses. These waves are partially blocked by a black
plastic bag and almost totally blocked by white paper or aluminum foil.
They go right through wax paper, clear plastic, and a metal screen.
Does anyone know the frequency (wavelength) range for typical remote
controls (for radios, TVs, DVD players, etc.)?
On a related note, my car remote pulses go through walls. Are these waves
similar to those for remotes I mentioned earlier, or is it in a different
part of the EM spectrum? I have not tried my shields with my car remote
yet.
Any other demos that can be done with these remotes?