Calculate magnifying power of a simple microscope consisting of convex lens of focal length 6.25 cm when the image is formed at :
the least distance of distinct vision (D = 25 cm)

A small telescope has an objective lens of focal length 140cm and an eyepiece of focal length 5.0cm. What is the magnifying power of the telescope for viewing distant objects when- the final image is formed at the least distance of distinct vision (25cm)?

Define magnification of an astronomical refracting type telescope and find an expression for it when the final image is formed at least distance of distinct vision.

The focal length of th eye-piece and ojective a compound microscope are 5 cm and 1 cm respectively and the length of the tube is 20 cm.Calculate he magnifying power of the microscope,when the final image is formed at infinity .The value of least distance of ditinct vision is 25cm.

With the help of ray diagram, describe the constru¬ ction, working of acompound microscope when the final image is formed at least distance of distinct vision (D = 25 cm). Derive an expression for its magnifying power (m)

A compound microscope has a magnification of 30. The focal length of its eye-piece is 5 cm. Assuming the final image to be formed at least distance of distinct vision (25 cm),calculate the magnification produced by the objective.

What is the magnifying power of an astronomical telescope when the final image of a distant object is formed at least distance of distinct vision?