Size and Its Units
1mm
Magnification:
100µm
the degree to
which the size of
an image is larger
than the image
itself.
10µm
Resolution:
the degree to
which it's possible
to distinguish two
objects close
together
1µm
calculating linear magnification of an
electron-micrograph using it's scale bar
1.measure the length of
the scale bar in mm
1000nm
2. convert to μm.
3. M = Image size/Actual size
calculating specimen size using
magnification
1.measure the length of the image
of the specimen in mm
2. convert to μm.
3. A = Image size/Magnification
calculating specimen size using a scale bar
1.measure the length of the specimen in mm
10nm
2. measure the length of the scale bar in mm
3. divide specimen by scale length
4. multiply the scale bar by the last answer
Eyepiece magnification x objective magnification
= overall magnification
1nm
*photos are screencaps by the video Powers of Ten™ (1977) by Eam Office,
depicting skin cell, tissues, capillary, white cell nucleus,
double helix molecule and bonded atoms.