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"Physical conceptions are free creations of the human mind, and are not, however it may seem, uniquely determined by the external world." -- Einstein
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| The above photograph is of the original Michelson-Morley apparatus |
| To the right we show a diagram of the Michelson-Morley apparatus. The light source, mirrors and detector are mounted on a granite block which is floating in a pool of mercury. The distance from the half-silvered mirror to the mirrors is about 1.2 meters. |  |
| The mirrors are set up so that the beam is doubled back and forth four times, as shown to the right. This increases the effective length of the "arms" of the interferometer by a factor of 4. |  |
We continued our discussion of Special Relativity. Although the order was different from the Supplementary Notes, we essentially covered the following parts of the notes:
