Answer:
Iris Diaphragm
Explanation:
Poor light quality can be solved by the IRIS DIAPHRAGM CONTROL because adjusting it allows more light to pass through the condenser, and therefore more
it allows more light to pass through the condenser, and therefore morelight is directed at the specimen.
The iris diaphragm adjusts the amount of light coming through the specimen. ... The fine adjustment brings the specimen into sharp focus.
IRIS DIAPHRAGM CONTROL — A lever (or rotating disk) that adjusts the amount of light illuminating the slide.
Iris diaphragm dial: Dial attached to the condenser that regulates the amount of light passing through the condenser. The iris diaphragm permits the best possible contrast when viewing the specimen.
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