Question

The magnification of a compound microscope is `30` and the focal length of its eye piece is `5cm`. Calculate the magnification produced by the objective, when the image is to be formed at least distance to distinct vision (`25cm)`
A. 5
B. 6
C. 8
D. 10

Answer 1

(a) When final image is formed at leat distance of distinct vision hten the magnifying power
`=M_(0)xx(1+D/(f_(e)))`
`30=M_(0)(1+25/5)`
`M_(0)=5`