A) A person struggles to read by holding a book at arm's length, a distance of 70 cm away. What power of reading glasses should be prescribed for her, assuming they will be placed 2.0 cm from the eye and she wants to read at the "normal" near point of 25 cm?
B) What is the focal length of a magnifying glass of 3.3 × magnification for a relaxed normal eye?
C) How far from a converging lens with a focal length of 36 cm should an object be placed to produce a real image which is the same size as the object?