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| 单词 | rowland circle |
| 释义 | > as lemmasRowland circle Rowland circle n. (also Rowland's circle) a circle on which the slit, (concave) diffraction grating, and detector of a spectrograph must all lie if all the spectral lines are to be brought to a focus on the detector.The circle has a diameter equal to the radius of curvature of the grating surface and is tangential to the grating at its midpoint.extracted from Rowlandn.< as lemmas |
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