Describe6 marksChallenge
A student prepares a temporary mount of onion epidermis and views it under a light microscope. The microscope is fitted with an eyepiece graticule that has 100 divisions. The student also has a stage micrometer that has 50 divisions, each division is 0.02 mm apart. By superimposing the two scales, the student observes that 20 divisions on the eyepiece graticule align exactly with 16 divisions on the stage micrometer. An onion cell appears to span 35 divisions on the eyepiece graticule.
Describe the steps the student should take to determine the actual length of the cell in micrometres (µm) and nanometres (nm).