Describe a Terrestrial telescope. Calculate its magnifying power.

What is a microscope? Explain simple microscope. Calculate its magnifying power.

with the help of labelled diagram, explain the formation of final image at least distance of distinct vision in case of astronomical telescope. Define its magnifying power and derive an expression for its magnifying power.

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.

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.

With the help of ray diagram describe construction and working of refracting type Astronomical telescope. Find an expression for its magnifying power when final image is formed at infinity.

Explain the construction and working of an astronomical telescope. find an expression for its magnifying power in normal adjustment.