On the Internet there are many resources on different types of microscopes and m

Question

On the Internet there are many resources on different types of microscopes and many photos
taken using microscopes. Look for several photos, if possible of the same organism, taken with the
microscopes that appear in the following table and complete the table.

Comparation of 4 types of microscopes SEM TEM Compound Stereoscopic resolution Type of lenses Maximum magnification Sample preparation uses 1. What type of microscope would you use to observe one of our erythrocytes (red cell of blood)? This cell measures 10 um. 2. Can you use a compound microscope to see a virus? Explain

Explanation / Answer

table-

SEM- resolution= 20nm; type of lense= electromagnetic lense; maximum magnification= 250000x or greaer; sample preparation-dry sample then coated with conductive material like osmium tetroxide.

TEM- resolution= 0.2nm; type of lense=electromagnetic lense; max magnification= 100000x or greater; sample prepared in vaccum

compound- resolution= 200nm; type of lense= convex; max magnification= 100x; sample is prepared by staining of thin sample or smear

Stereoscopic- resolution=120nm; type of lense= like compound microscope; max magnification= 100x; sample is prepared as compond microscope

ans1- SEM is used to view surface structure of cells

ans 2- their small sie, viruses can be best viewed using microscopes with large resolution power like SEM and TEM.

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