Answer:
Step-by-step explanation:
If 10 cells occupy the diameter of the field of view of a light microscope, then the size of one cell is equal to the diameter of the field of view divided by 10.
Diameter of field of view = 2000um = 2mm (since 1mm = 1000um)
Size of one cell = (diameter of field of view) / 10 = 2mm / 10 = 0.2mm
Therefore, the size of a cell is 0.2 mm.