Chronology Current Month Current Thread Current Date
[Year List] [Month List (current year)] [Date Index] [Thread Index] [Thread Prev] [Thread Next] [Date Prev] [Date Next]

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

Any other demos that can be done with these remotes?

Forum for Physics Educators