Superconcentrado 4D Powerlift

power 4dThe focal length of a lens with a power of +4D is 25 cm. Show More | Share Save. Class 12 PHYSICS GEOMETRICAL OPTICS. Topper's Solved these Questions. OPTICS BOOK -4D History - Check 4D number past winning history since 1985. 4D Number Pemutation. mBox, iBox, i-Perm Source . Date From. Date To. Disclaimer