a Gram positive bacterium or a Gram negative bacterium? Describe three different important
reasons (tagged as Reason #1, Reason #2, and Reason #3) why you made the choice you did. een
st ht microscopy( and electron microscopy (EM) (label them Sinn# i, sim#2). Next, describe two
important differences between BLM and EM (label them Diff#1, Diff#2) which type of
microscopy is better, and why do you think that?
Solution
Similarities Sim#1:-Form larger (magnified) and more detailed (highly resolved) images of
small objects or small areas of larger objects e.g. a leaf, part of a bone, etc. than can be formed
by the human eye. Sim#2:-Used in study and research in biology and medical sciences (more
about histology), material sciences e.g. metallurgy and other aspects of science.Specimens must
be carefully prepared using techniques appropriate for both the equipment and the sample e.g.
slicing, staining, mounting, etc Difference:- Diff#1:-Size: Light microscopes are smaller and
lighter, so are easier to move and set-up.Cost / Availability: Light microscopes are less expensive
than electron microscopes. Diff#2:-Radiation Type: Light microscopes use light (approx
wavelength 400-700 nm), electron microscopes use beams of electrons (approx equivalent
wavelength 1 nm),Resolution:-Electron microscopes have much higher resolution than light
microscopes ,Magnification:-Electron microscopes have much higher magnification than light
microscopes. Light microscopy is better because it is easy to use , low cost , easily available , use
visible light to work.
reasons (tagged as Reason #1, Reason #2, and Reason #3) why you made the choice you did. een
st ht microscopy( and electron microscopy (EM) (label them Sinn# i, sim#2). Next, describe two
important differences between BLM and EM (label them Diff#1, Diff#2) which type of
microscopy is better, and why do you think that?
Solution
Similarities Sim#1:-Form larger (magnified) and more detailed (highly resolved) images of
small objects or small areas of larger objects e.g. a leaf, part of a bone, etc. than can be formed
by the human eye. Sim#2:-Used in study and research in biology and medical sciences (more
about histology), material sciences e.g. metallurgy and other aspects of science.Specimens must
be carefully prepared using techniques appropriate for both the equipment and the sample e.g.
slicing, staining, mounting, etc Difference:- Diff#1:-Size: Light microscopes are smaller and
lighter, so are easier to move and set-up.Cost / Availability: Light microscopes are less expensive
than electron microscopes. Diff#2:-Radiation Type: Light microscopes use light (approx
wavelength 400-700 nm), electron microscopes use beams of electrons (approx equivalent
wavelength 1 nm),Resolution:-Electron microscopes have much higher resolution than light
microscopes ,Magnification:-Electron microscopes have much higher magnification than light
microscopes. Light microscopy is better because it is easy to use , low cost , easily available , use
visible light to work.
