question_answer 31)

An angular magnification (magnifying power) of 30 X is desired using an objective of focal length 1.25 cm and eye piece of focal length cm. How will you set up the compoundmicroscope ?  

Answer:

For the image formed at the least distanceof distinct vision, the magnifying power is given by Here and Using,we get, i.e. Now i.e. i.e. Using  we get, or or Again using we get (image is formed at 25 cm) or Thus, the distance between the objective and the eyes lens Also, the position of the object from the objective lens