Calculate the magnifying power of a lens of power 20 dioptre.

Define power of a lens

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.

The magnifying power of telescope is high,if

…is the unit of power of the lens

A converging lens of power 25 D is used as a simple microscoe.Calculae the magnifying power,if the distance of distinct vision is 25 cm.

The unit of power of lens is…… .

Calculate the resolving power of a telescope,whose objective lens has an aperture of 1.0 m for the wave-length of light 500 nm?

Define the magnifying power of compound microscope.