| 单词 | prism train |
| 释义 | > as lemmasprism train prism train n. a series of prisms used with a spectroscope to give increased dispersion of light. ΚΠ 1871 London, Edinb., & Dublin Philos. Mag. 4th Ser. 42 435 The prism-train consists of five prisms..and two half-prisms. 1968 Jrnl. Brit. Astron. Assoc. 78 342 There are two forms of dispersive element which can be employed in a spectrohelioscope: the prism train in the Littrow type..and the diffraction grating. 1973 Optics Communications 7 103 A comparison of prisms and gratings shows that in general a prism train is preferable as a dispersing device. < as lemmas |
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