Why Is It Important to Use Only the Fine Adjustment

question 15

Multiple Choice

Why is it important to use only the fine adjustment knob when using the high-power or oil immersion lenses?

• A)Using the coarse adjustment knob might crack the coverslip or slide, due to the close working distance.
• B)You will not be able to focus on the specimen with the coarse adjustment knob.
• C)There will not be enough light on the specimen to see it, if the coarse adjustment knob is used.
• D)The condenser does not function when using the coarse adjustment knob.
• E)The iris diaphragm does not function when using the coarse adjustment knob.

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