| 单词 | conjugate foci |
| 释义 | > as lemmasconjugate foci conjugate foci (of a mirror or lens): two points so situated that if a luminous point be placed at either, its rays are reflected or refracted to the other; so conjugate focal distance. conjugate mirrors: two parabolic mirrors so placed face to face that rays of heat or light emanating from the focus of either are reflected in parallel lines to the second and thence to its focus.extracted from conjugateadj.n.< as lemmas |
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