Studying cells & microscopy

• What is cytology?


  The study of cell structure
• What does a higher resolution mean?


  more detail seen on the image
• What does a 0.2um resolution power mean?


  that if 2 objects are closer ogether than 0.2um they are seen as ONE OBJECT in the image
• what is resolution?


  a measure of the microscopes ability to distinguish between 2 points which are close together on an objectg
• what is the magnification equation?

  image/actual
• What is the resolution of a light microscope?


  0.2um
• what is the resolution of an electron microscope?


  5 NANOMETRES
• Give 3 advantages of light microscopes?

  small. easy to use. relatively cheap
• give disadvantages of light microscopes?


  rely on light (wave length)

  resolution limited to 0.2 um - any details less than 0.2um will appear blurry so not good enough to study subcellular structure
• who uses electron microscopes and where?


  used by scientists in labs
• what is the maximum resolution of an electron microscope?

  0.1 nm
• how many times better are electron microscopes than light microscopes?


  2000 times better