- #1
PrakashPrasad
- 22
- 0
I get terribly confused to consider which rays for determining image formation via concave and convex lens? Many times examples take 3 rays into consideration - 1) A ray passing through Focus 2) A ray passing Optical Center (center of curvature) and 3)A ray parallel to principal focus. But the all examples then do not consider 3 rays every time - some times they consider only 2 rays for image formation and I get confused which and how to determine rays to consider for image formation via concave and convex lens - is there an easy way to follow it?