Differences

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--- demonstrations:3_oscillations_and_waves:mechanical_waves:travelling_waves:start [2019/02/14 23:33] – external edit 127.0.0.1
+++ demonstrations:3_oscillations_and_waves:mechanical_waves:travelling_waves:start [2020/03/13 21:03] (current) – demoroom
@@ Line 1: / Line 1: @@
 ====== Travelling Waves ======
-{{tag>yak's milk rope needs_review untagged unlocated}}
+{{tag> oscillations_and_waves standing_waves yak_milk_rope transmission located}}
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@@ Line 11: / Line 11: @@
 ===== Description =====
-Waves on a string    Classes Used: PHYS 101, PHYS 153
+A clear rubber rope filled with barium sulphate (a high density powder). It's about 9.5m long (~31 feet). One end is capped with a piece of acrylic rod, the other end is tied to a large brass lobster clasp.
 ===== Purpose =====
+This is a highly versatile demonstration. It can be used to demonstrate a number of concepts relating to waves and their propagation through media. It can be used to:
-  * To demonstrate waves on a string.
+  * Demonstrate how transverse waves can propagate through a string,
-  * To demonstrate the reflection of a pulse from a rigid non-rigid boundary.
-  *  To demonstrate stationary waves, in different modes.
-  * To demonstrate reflection and transmission of waves at a boundary.
+  * Demonstrate the reflection of a pulse from a rigid-non-rigid boundary,
-===== Apparatus =====
+  * Demonstrate reflection and transmission of waves at a boundary,
+  * Demonstrate standing waves,
-A rope identified as the Yak's Milk Rope consisting of a clear plastic tube filled with barium sulphate
+  * Demonstrate different modes of standing waves.
+===== Apparatus =====
+  * 'Yak's milk'((It was apparently named that by a previous professor who taught here some years ago. He was supposed to have an affinity for very colorful and interesting language- hence the name of this rope.)) rope
 ===== Setup =====
+The tubing is stretched across the lecture theatre with one end fixed to a hook on the wall while the other end is free to be manipulated by hand to show the various demonstrations. If no hook is available, attaching it to a door handle or a volunteer student may also work.  For the non-rigid reflection and for the partial reflection and transmission at a boundary the far end is attached to a piece of cord and the other end manipulated.
+The rope may also be laid flat on the floor and viewed with a camera from above. This is another way that travelling waves may be viewed. This definitely works better with the rope under tension and off the ground, though.
-The tubing is stretched across the theatre with one end fixed to the hook on the south wall while the other end is free to be manipulated by hand to show the various demonstrations.  For the non-rigid reflection and for the partial reflection and transmission at a boundary the far end is attached to a piece of cord and the other end manipulated.   Updated on: 06/20/13
+Finally, with a TA or volunteer, standing waves can be produced in the Yak's milk rope. Higher-order standing waves can be obtained with sufficiently great effort.
 ===== Notes =====
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-| **Location** | ---- |
+| **Location** | S4 |
 | **Maker** | Unknown |
 | **Current State** | Working |