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![Lens, Light and Your Eyes - bj's MST](https://www.iarticlesnet.com/pub/img/site/s_29.jpeg)
Lens, Light and Your Eyes - bj's MST
瀏覽:1158
日期:2024-07-10
What exactly are lenses? A lens is a transparent material, such a glass, that has either one curved surface and one flat surface or two curved surfaces. As with mirrors, these two lenses are either convex or concave. Convex lenses are thicker in the middl...看更多