The diagram shows an eyepiece graticule and a cell viewed through a microscope. When the eyepiece graticule was calibrated at this magnification, the whole length of the graticule shown covered 12 divisions of a stage micrometer scale. There were 100 divisions in 10 mm of the stage micrometer.
What is the actual length of the cell?
1 )
2.5 µm
2 )
3.6 µm
360µm
4 )
3 mm
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