microscopes and micrscopy

• two types of microscopes: light and electron
• eyepiece lens: has a fixed magnfication so the cell can be seen
• objective lens: allows different magnfications
• object: the real sample or object your looking at
• image: the image we see when we look down the microscope
• magnfication: how many times larger the image is than the object
• magnfication equation = image size / actual size
• resolution: the shortest distance between two points on an object

  or a measure on how detailed the image is
• light microscopes :

  easy to use

  cheaper

  rely on light

  resolution is limited

  cannot be used to study organelles in cells because of small resolution
• electron microscopes:

  very expensive

  hard to use

  uses electrons instead of light

  can be used to study organelles
• nanometers to micrometers = divide 1000
• micrometers to millimeters = divide 1000
• millimeters to meters = divide 1000
• meters to kilometers = divide 1000
• kilometers to meters = x 1000
• meters to millimeters = x 1000
• millimeters to micrometers= x 1000
• micrometers to nanometers = x 1000