Radioactivity
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SAT Subject Test in Physics › Radioactivity
Questions 1 - 1
1
Which material would be sufficient to stop most gamma radiation?
Several centimeters of lead
An aluminum plate
A sheet of paper
Skin
Plastic goggles
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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