|
Light Wave (Laser) Communication Demostration Demonstration
Instructions Demonstrate that the output of a tape player (or CD Player) is shunted to an external speaker when the stereo plug from an external speaker is plugged into the “ear” jack on the tape player.
Connect one of the specially prepared wires to the output of the tape player and to a coil of wire. Connect a second coil with a similarly prepared wire to the speaker/amplifier. By rotating the receiving coil (or transmitting coil) you can show how important it is to have an antenna oriented the same direction as the transmitter in TV reception for example. Next,
you mount the laser pointer to the small wood ring stand. Use the
right angle clamp to hold down the button on the laser pointer to
keep it turned on. Aim the laser into the hole in the case with
the solar cell. Connect the solar cell to the speaker/amplifier.
Demonstrate that an interruption of the laser beam will produce
a “click” of sound. By moving all of your fingers and
then by using a comb, you can demonstrate that increasing frequency
of interruptions of the laser beam will produce a sound. You can
even play notes by controlling the speed with which you move a comb
across the laser beam.
|
||||||||||||||
