Question

A compound microscope has a magnifying power of 100 when the image is formed at infinity. The objective has a focal length of 0.5 cm and the tube length is 6.5 cm. Find the focal length of the eyepiece.

Answer 1

For the give compound microscope,
f₀ = 0.5cm, tube length = 6.5cm
magnifying power = 100 (normal adjustment)
Since, the image is formed at infinity, the real image produced by the objective lens should lie on the focus of theeye piece.