How is the magnifying power affected if the objective elns and eye-lens are interchanged in a microscope.

Define the magnifying power of compound microscope.

A compound microscope uses an objective lens of focal length 4 cm and eyepiece lens of focal length 10 cm. An object is placed at 6 cm from the objective lens. Calculate the magnifying power of the compound microscope. Also calculate the length of the microscope.

How will the magnifying power of a refracting type astronomical telescope be affected on increasing for its eye piece the aperture?Justify your answer.

How will the magnifying power of a refracting type astronomical telescope be affected on increasing for its eye piece the focal length

The magnifying power and........produced by a lens are different from each other.

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)?