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Problem 10.9. A compound microscope has a 12 mm focal length objective and a 75 mm focal length eye piece, and the two lenses are mounted 200 mm apart. If the final image is 225 mm from the eye piece, what is the magnification produced?

Data

Focal length of object lens fo= 12mm

Focal length of eye piece lens fe = 75mm

Length of microscope l= 200mm

D= 225mm

Find magnificently m=?

Solution 

Magnificent m of mpound microscope Is given by M=Ma ×Me .......1

Where Mo and Me are objective and eye piece magnification of object is given by Mo =qo/po.....2

Where qo and po have no.determined