Saved Bookmarks
| 1. |
principal axis of spherical lens |
|
Answer» PrincipalFocus. Theprincipalfocus of alensis a point on itsprincipal axiswherein the rays of light parallel to it and after passing through it converge (for a convexlens) or appear to diverge (for a concavelens). Theprincipalfocus of alensis denoted by the letter F. |
|