i missed out on half the lesson coz of prefect meeting.. but i got the general geist.
it goes like this..
at 100x zoom (10 in the lens x 10 in the thingy) we measure (using a transparent ruler) the diameter of the field of view (circle that we see) getting around 1.8 - 2mm, which is converted to 180-200 micrometers
then we zoom into 400x zoom and count the amount of red blood cells seen in an imaginary diameter (around 50) and compare it to the length of the diameter to obtain the size of red blood cells.
white blood cells to measure size, are measured in porportion to the red, (about 1.5 times the red)
their nucleus appeared big and purple
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