A compound microscope with an objective of 1.0 cm focal length and an eye-piece of 2.0 cm focal length has a tube of lengh of 20 cm.Calculate the magnifying power of the microscope,if the final image is formed at the near point of the eye.

An astronomical refractive telescope has an objective of focal length 20 m and an eyepiece of focal length 2 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)?

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.

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.