Microscopy

• How can we view structures that you cannot see with the naked eye?


  MicroscopeS
• Name the blue label and its function

  Eyepiece: magnifies the image to the eyes

  
• Name the grey label and its function 


  Objective lens: magnifies the specimen, helps you see the detail of the sample more clearly

  
• Name the purple label and it’s function 


  Stage clip: holds the slide in place

  
• Name the pink label and its function:

  Condenser- focuses the light onto the specimen

  
• Name the red label and its function

  Mirror: reflects light onto the specimen

  
• Name the orange label and its function:

  Coarse focus: adjusts the distance between the objective lens and the slide

  
• Name the yellow label and its function:

  Fine focus: makes precise adjustments to get a clear view of the specimen

  
• Name the white label and its function


  Stage: holds the slide which contains specimen in place

  
• What is the purpose of microscopes?

  To enlarge images of extremely small structures like cells
• Who observed the first cells of cork and in what year?

  Robert Hooke in 1665
• What are the components of a light microscope?

  • Two lenses: objective and eyepiece
  • Objective lens produces a magnified image
  • Eyepiece lens further magnifies and directs the image to the eye
  • Usually illuminated from underneath
• What is the maximum magnification of a light microscope?

  x2000
• What does resolving power affect in microscopy?

  It affects resolution, the ability to distinguish between two points
• What is the resolving power of a light microscope?

  200 nm
• What types of structures can be viewed with a light microscope?

  Tissues, cells, and large sub-cellular structures
• When was the electron microscope developed?

  In the 1930s
• What is the advantage of using electrons in electron microscopes?

  Electrons have a much smaller wavelength than light waves