SAT II Physics : Radioactivity

Study concepts, example questions & explanations for SAT II Physics

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Example Questions

Example Question #1 : Radioactivity

Which material would be sufficient to stop most gamma radiation?

Possible Answers:

Plastic goggles


Several centimeters of lead

An aluminum plate

A sheet of paper

Correct answer:

Several centimeters of lead


Gamma radiation is high energy electromagnetic waves, and require a dense material such as lead to be blocked. 1 centimeter of lead reduces gamma radiation by 50%. Gamma rays easily pass through the other materials. 

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