Relativity
PIRA classification 7F
7F10. Special Relativity
PIRA # |
Demonstration Name |
Subsets |
Abstract |
7F10.05 |
Gravitational surface |
|
see 8C20.20 |
7F10.10 |
Lorentz transformation machine |
pira1000 |
A machine shows the behavior of clocks and measuring rods in two reference frames. |
7F10.20a |
Flow ripple tank |
pira1000 |
Wave propagation upstream and downstream is shown with a flow ripple tank. |
7F10.20b |
Flow ripple tank - twin source |
pira1000 |
Twin source interference in a moving medium is demonstrated with a flow ripple tank and variable phase generator. |
7F10.25 |
Foam rubber roller |
pira1000 |
|
7F10.26 |
Fitzgerald contraction model |
|
A stick traveling at constant velocity makes a traveling dimple in an elastic sheet. |
7F10.30 |
Time dilation simulation |
|
A folding carpenters ruler is used to simulate the effects of time dilation in a "bouncing light pulse clock". |
7F10.31 |
Time dilation - twin paradox |
|
An explicit formula for differential aging from acceleration. How do clocks, initially synched in the laboratory frame, fall out of sync as their speed relative to the lab increases. |
7F10.32 |
Relativistic length contraction |
|
The "pole in a garage" paradox is demonstrated using a collapsible pointer and two cardboard boxes. Simple diagrams for representing relativistic length contraction and time dilation. |
7F10.35 |
induction coil relativity |
|
On using the simple induction coil and galvanometer as a special relativity demonstration. |
7F10.40 |
Computer relativistic phenomena |
|
The Edwin F Taylor Spacetime Software is used to generate printouts demonstrating aberration, the Doppler effect, the headlight effect, etc. |
7F10.41 |
Many colored relativity engine |
|
The author's review of a simple program about relativistic space and time that requires no knowledge of physics, algebra, or geometry. |
7F10.50 |
Cylindrical relativity model |
|
A spacetime diagram rolled on a cardboard tube is used to demonstrate the nature of simultaneity and the propagation of light in a rotating coordinate system. |
7F10.55 |
Geometrical appearances |
|
Some examples are illustrated in detail. |
7F10.60 |
Lorentz transformation / time dilation |
pira200 |
The Mechanical Universe, chapter 42, and the Hewitt film "Relativistic Time Dilation". https://www.youtube.com/watch?v=feBT0Anpg4A |
7F20. General Relativity
PIRA # |
Demonstration Name |
Subsets |
Abstract |
7F20.01 |
General relativity primer |
|
A tutorial article |
7F20.10 |
Film loop review article |
|
Two film loops, "Uniformly Accelerated Reference Frame", and "Twin Paradox", are thoroughly reviewed. |