| 单词 | transmission grating |
| 释义 | transmission grating A type of diffraction grating comprising groves etched into a transparent mate- rial such as glass. As the elements of light in the incident spectrum strike the grooves at a certain angle, they are diffracted and, therefore, separated to various degrees, with blue light diffracted the least and red 74570c20.qxd 9/12/07 12:44 AM Page 497 |
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