Peel off a thin layer of onion skin, place it flat onto a microscope slide, add a drop of iodine and out a cover slip on top, Put the microscope light on and move the stage up, place microscope slide onto the stage, select the lowest objective lens and look through the eyepiece lens, when you can see a cell in the field of view, increase the magnification, draw what you see. Calculate the total magnification: eyepiece lens x objective lens, measure the length of your drawing in mm, x 1000 to convert it into micrometers and divide by the total magnification you viewed it at,

Microscopes RP

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النمط البصري

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