Asta Powerproject® - Construction Project Management Software

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 -Use the power of 4D to optimise your schedule with a fully integrated module making it easy to generate 4D plans. Learn more . 4D planning will transform your operation – read about