MICROSCOPIC MEASUREMENT

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MICROSCOPIC MEASUREMENT

• Millimetres
• Micrometres
• Nanometres
• Angstroms

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MILLIMETRE

• Symbol mm
• Activity Take a ruler and draw a line that is
  only 1mm in length. Use this extremely short line
  to help you visualize the next smaller unit of
  microscopic measurement, the micrometre.

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MICROMETRE

• 1 micrometre 1/1000 of a mm. Symbolum
• Another way to describe this measurement would be
  to say that there are 1000 micrometres in a
  single mm.
• Activity Divide your 1 mm line in half. How
  many micrometres are there on either side of the
  line?
• ANSWER 500
• Can you divide the mm into 1000 pieces?

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NANOMETRE

• Symbol nm
• 1nm 1/1000 of a micrometre
• Another way to express this measurement would be
  to say there are 1 million nanometres(nm) in a
  single mm.
• Try to visualize Were you able to visualize your
  1mm line cut into 1000 pieces? Now take one of
  those pieces and cut it into another 1000 pieces
  to represent a nm.

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ANGSTROM

• Symbol Å
• 1 Å 1/10,000 of a micrometre
• There are 10 million Angstroms in a single mm.
• Angstroms and nanometres are units that can be
  measured by an electron microscope.