A compound microscope has an a 12mm focal length objective and a 75mm focal length eyepiece and the two lenses are mounted 200mm apart. If the final image is 225mm from the eyepiece. what is the magnification produced?
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Answer:
Explanation:
Linear magnification is m
o
=
focallengthobjectivelength
tubelength
m
o
=
0.5
15
=30
Let the angular magnification be m
e
Total magnification is M=m
o
m
e
225=30×m
e
m
e
=7.5
Let the focal length of eye piece be f
e
.
Also m
e
=
f
e
25
f
e
=
7.5
25
=3.3cm
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