Question

question 4 (4 points)
2.02 mc
which type of microscope requires a nonmetal sample to be prepared for viewing by coating it with a thin layer of a conductive material?
a compound light microscope
b scanning electron microscope
c transmission electron microscope
d dissecting microscope

Explanation:

Scanning electron microscopes (SEMs) use a beam of electrons to scan the surface of a sample. Non - metal samples are often coated with a thin layer of a conductive material (such as gold or palladium) to prevent the build - up of static charge, which can distort the image. Compound light microscopes and dissecting microscopes use light and do not require such conductive coating. Transmission electron microscopes require very thin samples but not necessarily conductive coating for the same anti - static purpose as SEMs.

Answer:

B. Scanning electron microscope