Multiple Choice
Terrestrial radiation includes which of the following sources?
A) Long-lived radioactive elements such as uranium-238,radium-226,and thorium-232 that are present in variable quantities in the crust of the earth
B) Radioactive fallout from nuclear weapons tests in which detonation occurred above ground
C) The sun and beyond the solar system
D) Airport surveillance systems and electron microscopes
Correct Answer:
Verified
Correct Answer:
Verified
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