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| Subject | English | Russian |
| opt. | Sagnac effect | эффект Саньяка |
| opt. | Sagnac experiment | опыт Саньяка |
| opt. | Sagnac interferometer | интерферометр Саньяка (I. Havkin) |
| O&G | zero-area Sagnac interferometer | интерферометр Саньяка с нулевой областью (We refer to the above Sagnac topology as zero-area because even though the laser beams do trace out two triangles with definite areas, these areas are a vector quantity that cancel out since the beams are propogating in opposite directions. Мирослав9999) |