2026-01-10 16:37 浏览次数 12
凹透镜
1. a lens having a virtual focus for parallel rays
Plus lenses can to bringing objects into focus, but also magnify. Plus lenses magnify and minus lenses minify .
正透镜除了可以使光线聚焦以外,还附有使影像放大的作用。正透镜可以放大,负透镜可以缩小。