PHGN-471 Fall
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Revision as of 17:56, 19 September 2010
| Main Page | > | Physics Course Wikis |
Contents |
Course Information
Instructors: Frank Kowalski
Measuring Length Contraction
Ideas on how to measure length contraction
1) Imagine the face of a clock, each tick on the outer rim would stick out slightly and be made up of a conductive material. As is rotates, the ticks will come into contact with a circuit that is attached to the time interval analyzer. When the ticks hit, it will complete the circuit and send in an electrical signal. We can measure the amount of time it takes between the ticks, and then compare it to a calculated time to see if the length has contracted.
2) Have a similar apparatus as 1), but now the ticks will hold onto something loosely, but still snug enough to stay on while it rotates. As it speeds up faster, the length with contract between the two ticks, and the clamp should fall off.
3) Have a laser shot onto the edge of the rotating wheel, and a receiver on the other end. The receiver will allow us to view a waveform of the frequency that was sent in and hopefully we can observe where the ticks are on this waveform. Then we can compare it to a calculated value.
4) Same as 3), but can use types of input signals.
5) Instead of having tick marks on rotating circle, there could slits length wise near the edges.
6) Instead of measuring the distance between the slots, the slots could we wider and the size of the slots themselves could be measured to see if they contracted.
7) These slots should probably be like an element dr, instead of rectangular, so that they stay fluid as the circle rotates.
8.) Two arm interferometer with each beam reflecting from a different radius of a spinning mirror.
9.) Measure the torque on a rotating rigid body as length contraction generates forces.
10.) Cone rotating about the symmetry axis. The cone shape would change as the different circumferences are effected by length contraction.
11.) Measure the volume change of the rotating cone.
12.) A charged rotating object should emit a radiation pattern in which length contraction is manifest.
13.) Generate two points at different radii on the rotating object from which to send a time stamps. There should be different times generated.
14.) Put a mirror on the rotating object from which a beam generated in the lab frame reflects.
