The following figure represents two biconvex lenses L1 and L2 having focal length 10 cm and 15 cm respectively. The distance between L1 & L2 is :
1
10 cm
2
15 cm
3
25 cm
4
35 cm
The following figure represents two biconvex lenses L1 and L2 having focal length 10 cm and 15 cm respectively. The distance between L1 & L2 is :