Required Practical 1: Microscopes


Required Practical: Microscopes 

I should be able to:  

  • Describe how to use an optical microscope to look at cells on a prepared microscope slide. 


The Microscope 

  • The centre of the microscope has a stage.  

  • This is where we place the microscope slide. 

  • The stage has clips to hold the slide in place.  

  • Below the stage, there is a lamp. 

  • Light from the lamp passes up through the microscope slide.  

  • Some microscopes have a mirror instead of a lamp. 

  • The mirror is used to reflect light up through the microscope slide.  

  • Above the stage, we have a set of lenses. 

  • These are called the objective lenses. 

  • Most microscopes have 3 different objective lenses. 

  • These usually have a magnification of 4x, 10x or 40x. 

  • At the top of the microscope, we have the eyepiece. 

  • This is where we look through. 

  • The eyepiece contains the eyepiece lens which has a magnification of 10x.  

  • The final parts of the microscope are the coarse focusing dial and the fine focusing dial.  





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