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Re: [Phys-l] remotes



Could I do this w/o any purchases at all by holding various materials between my car remote and the car?

On Nov 4, 2011, at 3:43 PM, Anthony Lapinski wrote:

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?

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