An Electron Beam Strikes a Specimen in an Area Where

An electron beam strikes a specimen in an area where there is a high concentration of heavy metal atoms. What does a spot on the phosphorescent screen of the electron microscope just below this part of the specimen look like if compared to the area of the specimen where there is the high concentration of heavy metal atoms?

A) It is darker.
B) It is brighter.
C) It is speckled.
D) It is invisible.
E) It is purple.

Correct Answer:

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