Define the magnifying power of a compound microscope when the final image is formed at infinity. Why must both the objective and the eyepiece of a compound microscope have short focal lengths ? Explain.

Draw a schematic ray diagram of a compound microscope with the final image formed at infinity.

(i) Draw a neat labelled ray diagram of a compound microscope . Explain briefly its working . (ii) Why must both the objective and the eye-piece of a compound microscope have short focal lengths ?

Magnifying power of a simple microscope is (when final image is formed, at D=25cm from eye)

The focal length of the objective lens of a compound microscope is

Draw the labelled ray diagram for the formation of image by a compound microscope. Derive the expression for the total magnification of a compound microscope. Explain why both the objective and the eyepiece of a compound microscope must have short focal lengths.

In a simple microscope, if the final image is located at infinity then its magnifying power is

The image formed by an objective of a compound microscope is

The image formed by an objective of a compound microscope is

The magnifying power of compound microscope in terms of the magnification m_0 due to objective and magnifyging power m_E by the eye-piece is given by

Find the distance between the two lenses of a compound microscope if the final image formed by the microscope is virtual and lies at a distance of 25cm to the left of the eye- piece. Magnifying power of the microscope is 30 and focal lengths of objective and eyepiece are 2cm and 5cm, respectively.