A) A Galilean telescope adjusted for a relaxed eye is 36.4cm long. If the objective lens has a focal length of 38.5cm , what is the magnification? Follow the sign conventions.
B) A microscope uses an eyepiece with a focal length of 1.65 cm . Using a normal eye with a final image at infinity, the barrel length is 17.5cm and the focal length of the objective lens is 0.60cm . What is the magnification of the microscope?