A compound microscope has a magnification 30. The focal length of eyepiece is 5 cm. Assuming that the final image is formed at least distance of distinct vision (25 cm). Find the magnification produced by objective.
Given,
Magnification,M=30
Focal length, f=5 cm
Final distance, D=25 cm
In a compound microscope, M=mo×me
Thus,
30 =
mo(1+Df)
30 = mo(1+255)
Thus, mo=5