Microscopy

• $magnification =$$image / actual$
• Why do microscopes use lenses?

  Microscopes use lenses to magnify the image of a biological specimen so that it appears larger.
• What is the formula for magnification?


  Size of image / Size of real object
• Cells range in size:

  • animal cells are between 0.01 mm – 0.05 mm
  • plant cells are between 0.01 mm – 0.10 mm
• The human eye can see objects as small as what?


  The human eye can see objects as small as around 0.05 mm. 
• In 1650, Robert Hooke observed and drew cells using a compound microscope.
• Light microscopes have a limited magnification and a limited resolution.