| DCS # | DEMONSTRATION | REFERENCE | ABSTRACT |
|---|
| 3B33.00 | Phase and Group Velocity | | |
| 3B33.10 | group velocity on scope | PIRA 500 | |
| 3B33.10 | group velocity on scope | 3B33.10 | Two sine waves of almost equal frequencies and their sum are displayed on a oscilloscope. |
| 3B33.10 | wave and group velocity on scope | AJP 31(12),xiii | Directions for showing wave and group velocities on the oscilloscope. |
| 3B33.10 | phase and group velocity | AJP 46(5),579 | This article spells out the subtleties for getting both traces to move in one direction. |
| 3B33.10 | phase and group velocity | Sl-2 | An oscilloscope shows signals from two oscillators and the sum. |
| 3B33.10 | group and phase velocity | 38-6.1 | Two sine waves are added and displayed on an oscilloscope. Picture, Diagram. |
| 3B33.11 | group velocity | 38-6.2 | Measuring group velocity using two sine waves and an oscilloscope. Diagram. |
| 3B33.12 | group velocity - gated pulse | AJP 41(11),1283 | An amplifier circuit is given that gates a sine wave generator with a square wave generator. The resulting packets of sine waves are found to be superior to the beat method. |
| 3B33.18 | group and phase vel.- apple peeler | S-2k | This group and phase velocity device was made from an apple peeler. |
| 3B33.20 | two combs | PIRA 1000 | |
| 3B33.20 | two combs | AJP 37(8),842 | Superimpose two combs on the overhead projector to show phase and group velocity. |
| 3B33.20 | two combs | AJP 38(4),547 | This was published in AJP,21,388 (1953). |
| 3B33.20 | two combs | 18-8.9 | Move two combs across each other on an overhead projector to demonstrate phase and group velocity. Picture. |
| 3B33.21 | phase and group velocity with bars | 18-8.10 | Two sheets of bars of ratio 9:10 are superimposed on the overhead projector. A revolving model works too. |
| 3B33.22 | densimeter comb | 18-8.13 | Two densimeter plates are used in place of combs. Pictures. |
| 3B33.25 | phase and group velocity on the OH | 18-8.8 | A sheet with black bands is pulled across an overhead projector covered except for slits parallel, perpendicular, and at 45 degrees to the motion. Picture, diagram, construction details in appendix, p. 635. |
| 3B33.30 | R H Good software | AJP 54(12),1064 | Free Apple II software showing, among other things, group and wave velocity. This is the best Apple II software ever written. |
| 3B33.31 | group velocity software | AJP 54(7),656 | A short review of group velocity that happens to mention some software. |
| 3B33.40 | group and phase velocity in a pool | AJP 41(10),1203 | Make a large scale demonstration in a fountain pool (14' x 25' x 1'). |