Find the angular magnification of an image by a magnifying glass of \(f=5.0 \mathrm{cm}\) if the object is placed \(d_{\mathrm{o}}=4.0 \mathrm{cm}\) from the lens and the lens is close to the eye.

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A very myopic man has a far point of \(20.0 \mathrm{cm}\). What power contact lens (when on the eye) will correct his distant vision?

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A light bulb is placed 10 cm from a plane mirror, which faces a convex mirror of radius of curvature \(8 \mathrm{cm}\) The plane mirror is located at a distance of \(30 \mathrm{cm}\) from the vertex of the convex mirror. Find the location of two images in the convex mirror. Are there other images? If so, where are they located?

People who do very detailed work close up, such as jewelers, often can see objects clearly at much closer distance than the normal \(25 \mathrm{cm}\). (a) What is the power of the eyes of a woman who can see an object clearly at a

A large reflecting telescope has an objective mirror with a \(10.0-\mathrm{m}\) radius of curvature. What angular magnification does it produce when a \(3.00 \mathrm{m}\) -focal length eyepiece is used?