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Chapter 25: Problem 49

Explain why the rem is more satisfactory than the rad as a unit for measuring radiation dosage.

Short Answer

Expert verified
The rem is a more satisfactory unit for measuring radiation dosage than the rad because it not only considers the amount of absorbed radiation, but also its potential biological impact. Whereas, the rad only measures the quantity of absorbed energy from radiation, and does not take the damage level into account.

Step by step solution

01

Definition of Rad

The rad is a unit of measure for the absorbed dose of radiation. In other words, it measures the quantity of energy absorbed by an object or person due to exposure to radiation. It's written as \( 1 \, \text{rad} = 0.01 \, \text{joules per kilogram} \).
02

Definition of Rem

The rem (Roentgen Equivalent in Man) is a unit that takes into account the type and intensity of radiation and its biological effect on human tissue. Instead of just measuring the amount of energy absorbed by an organism, the rem measures the biological impact it could have. So, it can be considered as a more holistic measurement.
03

Comparison & Conclusion

While rads quantify the amount of energy absorbed from radiation, rems account for the potential biological damage such radiation can do, providing a superior measurement method for assessing radiation dosage. This is due to the fact that not all radiation causes an equal amount of harm; some forms might be more damaging than others, even if the energy they deliver is the same. Hence, rems give a more accurate estimate of biological damage from radiation exposure, making them a superior unit.

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