Where is the dirt? A micro student looking through his

Last updated: 7/6/2022

Where is the dirt? A micro student looking through his microscope observed a small, spherical object. The student felt something must be wrong since he was looking at a slide of Spirogyra. His lab partner suggested maybe it was dirt? He rotated his ocular lens to see if the speck would rotate. It did not rotate. What should he check next? A. adjust the diaphragm B. adjust the condenser C. clean the objective lens D. clean the ocular lens