Calculating magnification: Follow these instructions exactly and in sequence!
• Note the measurement stated in the question e.g. 2um, on the diagram or beside the diagram. A micrometer (um) is 1/1000th of a millimeter
Measure VERY accurately the distance between the two points (e.g. X & Y) that are indicated on the diagram or image. This will be in mm (millimeters) – HINT: take the rule and look down at the scale - don’t look sideways as this distorts your view
Now, take the actual measurement you’ve made between the two points on the diagram e.g. 52mm
Divide the actual measurement by the measurement given in um (for the distance between X & Y) - 52 divided by 2 = 26
As one micrometer = 1/1000th of a millimeter, you need to say that 52 mm is really 52 000 micrometers
So, 52 000 / 2 = 26 000 or, the image is magnified by 26 thousand – a typical magnification by an electron microscope
