An angular magnification (magnifying power) of `30 X` is desired using an objective of focal length `1.25 cm` and an eye piece of focal length `5 cm`. How will you set up the compound microscope ?

Answer

`mu_(0) = -1.45, v_(0) = 8.75, L = v_(0) +c f_(e) = 13.75`

Explanation

`V_(theta) = oo`
`u_(e) = f_(e) = 5cm`
`M = -(V_(0))/(u_(0)) xx (D)/(f_(0)) rArr 30 = - (V_(0))/(u_(0)) (25)/(5)`
`V_(0) = -6 u_(0)`
`rArr u_(0) = -1.45, v_(0) = 8.75, L = v_(0) + f_(0) = 13.75`