microscopes

• How to use a light microscope:

  1. move stage down to lowest position
  2. place slide onto stage under clips
  3. use lowest power objective lens
  4. turn course focus knob till see cells
  5. turn fine focus knob till focused
  6. repeat steps 1-5
• Transmission electron microscope (TEM)

  • use electromagnets to focus electron beam
  • dense parts absorb more so image is darker
  • high resolution
  • only used on thin specimens
• Scanning electron microscope (SEM)

  • scan a beam of electrons
  • 3D image
  • lower resolution than TEM