Why is it not advisable to interchange one ocular lens with another from a different brand microscope?
a. The two ocular lenses in a microscope are optically matched with one another.
b. The fitting for the ocular lenses varies, so they will not fit in another microscope.
c. They cannot be removed from the microscope.
d. They are fragile and are likely to break when removed from the microscope.
ANS: A
Ocular lenses are optically matched to one another and so should not be interchanged with one another, especially not one of another brand. They can and are, though, easily removed for such tasks as cleaning.
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