Your biology teacher has asked you to do the impossible! you must measure the diameter of one algal cell. you are about to turn in a blank lab report when your friend mel comes along and says it is an easy task. first he shows you how to compute the diameter of your field of view. at 40x, your field of view is .50 mm or 500 um. if you look carefully you count 15 algal cells spanning the field of view.

the diameter of one algal cell is approximately

a) 0.03um
b)1.50um
c)3.00um
d)33.3um