Biology – 2.2 Size of specimens | e-Consult
2.2 Size of specimens (1 questions)
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Total magnification = Eyepiece magnification x Objective magnification
Total magnification = 10mm x 40 = 400x
Size of object in the specimen = (Size observed in the specimen) / (Magnification)
Size of cheek cell in the specimen = 80 micrometres / 400 = 0.2 micrometres
Convert micrometres to millimetres: 0.2 micrometres x (1mm / 1000 micrometres) = 0.0002mm
Therefore, the total magnification is 400x and the cheek cell appears to be 0.0002mm in diameter.