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--- demonstrations:3_oscillations_and_waves:mechanical_waves:standing_wave_machine:start [2019/02/14 23:33] – external edit 127.0.0.1
+++ demonstrations:3_oscillations_and_waves:mechanical_waves:standing_wave_machine:start [2020/01/07 20:16] (current) – [Standing Wave Machine] demoroom
@@ Line 1: / Line 1: @@
 ====== Standing Wave Machine ======
-{{tag> needs_review untagged unlocated}}
+{{tag> standing_waves oscillations_and_waves illusion unlocated}}
 <WRAP box right>
-{{Standing_Wave_Machine.jpg?400|}}
+{{ :demonstrations:3_oscillations_and_waves:mechanical_waves:standing_wave_machine:mvimg_20190514_123213.jpg?400|}}
 // //
@@ Line 11: / Line 11: @@
 ===== Description =====
-Generate Awesome Standing Waves!    Classes Used: Phys 153
+An unusual-looking device. Two DC motors on the end of plastic arms are connected to a center piece with a 3-color LED strobe light and a dials and buttons to control it. A length of string is connected between the two motors.
-This demo is capable of showing anywhere from a half wavelength to two wavelengths by adjusting the motor speed and string length in 'Manual' mode. If the 'Demo' mode is selected, it will put on an impressive light display and go through varying strobe light frequencies and motor speeds.  Updated on: 09/25/13
 ===== Purpose =====
+This can be used to demonstrate the appearance of standing waves in a string. Specifically, the sort of standing waves that are formed by the spinning of a string. This can also be used to show how strobe lights can shed light on rapidly-changing-but-periodic systems.
 ===== Apparatus =====
+  * Handheld standing wave machine
 ===== Setup =====
+This demo is capable of showing anywhere from a half wavelength to two wavelengths by adjusting the motor speed and motor separation in 'Manual' mode. If the 'Demo' mode is selected, it will put on an impressive light display and go through varying strobe light frequencies and motor speeds.
 ===== Notes =====
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 <WRAP group>
 <WRAP half column>
+<WRAP box right>
+{{ :demonstrations:3_oscillations_and_waves:mechanical_waves:standing_wave_machine:mvimg_20190514_123259.jpg?400|}}
+// The device can be folded up like this for easier storage and transport. //
+</WRAP>
+<WRAP box right>
+{{ :demonstrations:3_oscillations_and_waves:mechanical_waves:standing_wave_machine:videoplayback.mp4 |}}
+// //
+</WRAP>
 </WRAP>
 <WRAP half column>
+<WRAP box right>
+{{ :demonstrations:3_oscillations_and_waves:mechanical_waves:standing_wave_machine:img_20190514_123239.jpg?400|}}
+// What the device looks like in full light, against a dark background.//
+</WRAP>
+<WRAP box right>
+{{ :demonstrations:3_oscillations_and_waves:mechanical_waves:standing_wave_machine:videoplayback2.mp4 |}}
+// //
+</WRAP>
 </WRAP>