A compound microscope consists of an objective lens of focal length 1 cm and an eye piece of focal length 5 cm with a separation of 10 cm.
The distance between an object and the objective lens, at which the strain on the eye is minimum is `n/40cm`. The value of n is ___________

A compound microscope consists of an objects lens of focal length 2.0 cm and an eyepiece of focal length 20cm? If the system a converging or a diverging lens? Ignore thickness of the lenses.

A compound microscope consists of an objective of focal length 1 cm and an eye-piece of focal length 5cm . An object is placed at a distance of 0.5cm from the objective. What should be the separation between the lenses so that the microscope projects an inverted real image of the object on the screen 30 cm behind the eye-piece ?

A compound microscope consists of an objective of focal length 1 cm and an eyepiece of focal length 5 cm. An object is placed at a distance of 0.5 cm from the objective. What should be the separation between the lenses so that the microscope projects an inverted real image of the object on a screen 30 cm behind the eyepiece?

A microscope has an objective of focal length 1.5 cm and eye piece of focal length 2.5 cm . If the distance between objective and eyepiece is 25 cm . What is the approximate value of magnification produced for relaxed eye ?