A SCREEN IS PLACED 90 CM FROM AN OBEJCT. THE IMAGE OF THE OBJECT ON THE SCREEN IS FORMED BY A CONVEX LENS AT TWO DIFFERENT LOCATIONS SEPARATED BY 30 CM. FIND THE FOCAL LENGTH OF THE LENS.

Asked by sohamsouthpoint02 | 30th Dec, 2017, 01:28: AM

Expert Answer:

Answered by  | 31st Dec, 2017, 02:25: PM