SAT II Physics : Radioactivity

Study concepts, example questions & explanations for SAT II Physics

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Example Questions

Example Question #34 : Sat Subject Test In Physics

Which material would be sufficient to stop most gamma radiation?

Possible Answers:

Plastic goggles

Skin

A sheet of paper

An aluminum plate

Several centimeters of lead

Correct answer:

Several centimeters of lead

Explanation:

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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