Question Video: Comparing the Damage Done by Different Doses of Nuclear Radiation | Nagwa Question Video: Comparing the Damage Done by Different Doses of Nuclear Radiation | Nagwa

# Question Video: Comparing the Damage Done by Different Doses of Nuclear Radiation Science • Third Year of Preparatory School

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Which would be more damaging, a single dose of nuclear radiation that is 2 rem or three separate doses of nuclear radiation that are each 1 rem?

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### Video Transcript

Which would be more damaging, a single dose of nuclear radiation that is two rem or three separate doses of nuclear radiation that are each one rem?

This question is asking us whether a single dose of two rem is more or less damaging than three separate one-rem doses. Recall that rem is the unit of measurement for absorbed dose. Absorbed dose is a measure of the amount of energy per kilogram absorbed by whatever material is exposed to the radiation. So, the greater the absorbed dose, the greater the amount of energy per kilogram that is absorbed. This greater absorbed dose will have a larger value of rem.

Repeated small doses will have what is called a cumulative effect. This means that even if the doses are several days apart, the next dose adds to the damage done by the previous dose. Since the effects of multiple doses of nuclear radiation are cumulative, it is more damaging to receive the three separate doses of nuclear radiation that are each one rem. This is because the total rems received over the three doses is three rems, which is greater than the two rem of the single dose.

The correct answer is therefore option (B). The separate doses would be more damaging than the single dose.

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