Microscopy

• Formula for magnification

  magnification = image height ÷ object height
• Why are electron microscopes better than light microscopes

  Electron microscopes have a much greater magnification and resolution
• eyepiece


  where we look through
• Microscope required practical

  Using the microscope:

  1. Place slide on stage. Use clips to hold slide in place.
  2. Select lowest power objective lens.
  3. Position objective lens so it almost touches microscope slide. Use coarse focusing dial to do this.
  4. Look through eyepiece and slowly turn coarse focusing dial. Do this until cell comes into focus
  5. Use fine focusing dial to bring cells into a clearer focus
• Total magnification

  magnification of eyepiece x magnification of objective lens