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| Pira: 6A 40.41 |
| Title: Invisibility Fluid |
| Demonstrates: Index of Refraction. |
| Description: A mixture of CCl4 and C6H6 has an index of refraction similar to Pyrex glass. When a rod of soft glass is placed in fluid, it can be clearly seen. When a pyrex glass rod is placed in fluid it becomes "invisible." |
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