Can I turn a lightbulb on without electricity
Magic with electricity
The most important thing in magic is the illusion. So that the magician does not become unemployed, he must under no circumstances reveal what is behind the illusions of his performance.
It's different here: We use the illusion but reveal the tricks behind it. Because we want to create a fascination for the physics of electricity, but we also want to learn something in the process.
The motto here is:
However, we don't reveal all the tricks here - the illusion shouldn't be removed beforehand.
The circuitWe make it clear with "living" paper. A student draws the circuit on the prepared paper with a soft pencil.
And indeed: when the pencil line is closed, the lamp lights up.
This is not a wrong trick with a hidden switch - however, a little electronics have to help to increase the low current flow through the graphite line.
Of course I tell the kids that we don't have any light switches at home, we switch everything with pencil lines. There is an eraser to turn it off ...
Magic saltNo magic without magic salt. We try to let electricity flow through water. Only after adding our magic salt does the bell sound.
Of course there is an explanation for this:
Light light bulbsEveryone knows who invented the light bulb. But who invented the light switch? How did you turn on the lightbulb before the light switch existed? Of course: with a match. And you can blow it out just like a candle - logical right?
This trick shows that this works.
And by the way, we learn that it is based on a small part that can be found in the stove or in the hair dryer.
The living speaker cableThe problem: At my party, the cable between my MP3 player and the loudspeaker is missing.
The solution: my guests are the cable.
With a little electronics, the whole school class can serve as speaker cables.
The magic light bulbThis magic trick shows that it can also be done without cables. I unscrew the light bulb from its socket, take it in my hand and then point the plasmon accelerator (or was it a flux compensator?) That I made myself at my hand. I light up the lightbulb for a short time.
On the occasion we learn something about a tricky component in the bicycle speedometer ...
Things you can't seeLittle researcher quiz: How do I actually find out whether the lamp in the refrigerator really goes out when you close it? Many explain the mechanism and conclude that the light has to go out (because of the door switch). But how can I really PROVE that?
A great intermediate exercise to bring some momentum to the audience ...
Things you really can't see - Ralf's magical lookYou press the buttons on the TV remote control every day and somehow the TV sees which button I press.
I can do that too: We cover the buttons on the remote control, but I can still see as soon as a button is pressed.
There is something to learn about the light spectrum here ...
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