Editing Theremin (section)

== Why This Works ==

The Theremin is an electromagnetic instrument. '''''Electromagnetism''''' is the study of electricity, light, and magnetism. For this demonstration, we are looking at electricity, and how this weird instrument can be played without being touched! When you move by the vertical antenna, you hear the pitch change. When you move by the horizontal antenna, you hear the volume change. These changes happen when the Theremin detects a change in frequency. '''''Frequency''''' in electromagnetism is a count of the number of waves per second. When the Theremin is on, it is constantly sending electromagnetic waves out from the antenna. If something conductive is near the antenna, such as your hand, then the waves bounce back at the antenna, which the Theremin detects. When you move your hand closer, the waves bounce off of it sooner, and the higher the frequency the Theremin detects. For the vertical antenna, a high frequency means a high note, and a low frequency means a lot note. For the horizontal antenna, a high frequency means a low volume, and a low frequency means a high volume.

The Theremin detects these changes in frequency because it behaves similarly to a capacitor. '''''Capacitors''''' are when you have two conductive surfaces near each other with a non conductive material between them. This space between the conductive surfaces can be used to store charge. In this case, the first conductive surface is the antenna, and the second conductive surface is you! When you move near the antenna, you are adjusting the '''''capacitance''''', or the amount of space to store charge between you and the antenna. As you move closer, the space becomes smaller, and the potential amount of charge stored becomes smaller. This change in capacitance is what changes the frequency that the theremin detects. By decreasing the capacitance, the frequency increases.
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===Full Explanation===
This is where you will explain the demonstration in full, and provide all additional information that pertains to the demo. Unlike the short explanation above, this should be worded so someone who is familiar with the topics might understand it. If needed, you can provide equations and citations for additional sources of information on the topic. This is also where you will find some answers for trickier questions, such as "How does a plane fly upside-down?" for the Bernoulli's Principle demo. If you want to add a floating box for equations, copy the following:

{| class="wikitable" style="color:black; background-color:#ddd; text-align: center; margin: auto"
| This will give you
| a floating box.
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| The box will be
| centered for you.
|}
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