A man with normal near point (25 cm) reads a book with small print using a magnifying glass: a thin convex lens of focal length 5 cm- What is the maximum and the minimum angular magnification (magnifying power) possible using the above simple microscope?

A man with normal near point (25 cm) reads a book with small print using a magnifying glass: a thin convex lens of focal length 5 cm- What is the closest and the farthest distance at which he should keep the lens from the page so that he can read the book when viewing through the magnifying glass?

A card sheet divided into squares each of size 1 mm^2 is being viewed at a distance of 9 cm through a magnifying glass (a converging lens of focal length 9 cm) held close to the eye. What is the angular magnification (magnifying power) of the lens?

What is th magnification produced by a single convex lens used as simple microscope in normal use?

A diamond cutter uses a jeweller's lens to eamine a diamond.If the focal length of the lens is 16 cm ,what is the maximum angular magnification fo the diamond?

A glass (mu=1.5) convex lens of focl length 40 cm is placed in water (mu=1.3) .What will be its new focal length?

At what distance should the converging lens of focal length 10 cm be held in order to view the squares distinctly with the maximum possible magnifying power?

The near vision of an average person is 25 cm. To view an object with an angular magnification of 10, what should be the power of the microscope?

A giant refracting telescope at an observatory has an objective lens of focal length 15m. If an eyepiece of focal length 1.0cm is used, what is the angular magnification of the telescope?

A doctor advises a patient to use spectacles with a convx lens of focal length 40 cm in contact with a concave lens of focal elnggth 25 cm.Wjhat is the power of the resultant combination?