Saved Bookmarks
| 1. |
The power of concave lens is___ |
| Answer» TION:Concave lens surfaces have a virtual and therefore NEGATIVE radius of CURVATURE. The convention signs used for focal length are ALSO used for optical power. Convex lenses, which have a real FOCUS, have a positive focal length and optical power. Concave lenses, with a virtual focus, have a negative focal length and optical power. | |