All of the following are guidelines for using the oil-immersion lens EXCEPT which statement?
A) Once your slide is in position, place a drop of oil on the slide and focus first at low power.
B) Place the slide on the microscope and focus first on low power and then medium and the high dry magnifications.
C) Once the oil-immersion lens is in place, swing the objective away from the slide and add a small drop of oil.
D) Once the oil is applied and the oil-immersion objective lens is moved in place, focus the lens with the fine adjustment knob.
A
Explanation:
B) This is the proper sequence of focusing on any specimen under the microscope.
C) Once the oil is applied, slowly move the oil-immersion lens in place.
D) This is the proper procedure for using the oil-immersion objective lens.
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