Lens calculations

Questions (2)

Without his glasses, Isaac can see objects clearly only if they are less than 4.2 m from his eyes. What focal length glasses
1. 2 answers
2. asked by msj
3. 921 views
A 24mm high object is 15cm in front of a +10cm concave lens . 24cm behind the convex lens is a -10cm concave lens . Calculate
1. 1 answer
2. asked by Gladson munthali
3. 460 views