Under a light microscope, cells look a bit like this...
                                 X 100 mag
           What type of cell is this? Why?
   Under an electron microscope…
                              n                                                   n
                           tio                                                 tio
                          a                                                  ca
                        fc                                                 f      0
                      ni                                                 ni      0
                   ag       0                                          ag     0 0
                           0                                                 0
                 M      15                                          M 0
                       x                                                    
                                                                        X2
                           Light microscope                                                 Electron Microscope
                 Light passes through the specimen and                           Passes a beam of electrons through the 
                 then through the magnifying lenses so                                    specimen to magnify it 
                    you can see the object much bigger
                              n                                                   n
                           tio                                                 tio
                          a                                                  ca
                        fc                                                 f      0
                      ni                                                 ni      0
                   ag       0                                          ag     0 0
                           0                                                 0
                 M      15                                          M 0
                       x                                                    
                                                                        X2
                           Light microscope                                                 Electron Microscope
                                                                           More expensive more high magnifcation
                 Much cheaper but lower magnifcation                                Gives a higher resolution.
                                                                      This means you can tells the difference between 2 
                                                                         objects even if they are really close together.
   A light microscope shows us 
   bacteria don't have a nucleus
   An electron microscope shows 
    us that bacteria have two 
    types of DNA, chromosomal 
     and plasmid DNA.