Final answer:
Deterministic effects from radiation indeed have a threshold dose; below this threshold, no effects are observed, while above it, the severity of effects increases with dose. The biological impact of different types of radiation is also accounted for by the Relative Biological Effectiveness (RBE).
Step-by-step explanation:
The statement that deterministic effects from radiation have a threshold dose is true. Deterministic effects refer to the health effects that occur as a direct result of exposure to ionizing radiation, such as burns or radiation sickness, and they typically have a threshold below which no effects are observed. Above this threshold, the severity of the effects increases with the dose. It is important to note that these effects are distinct from stochastic effects, where the probability of occurrence, like cancer or genetic mutations, increases with dose but without a threshold.
Moreover, the effects of ionizing radiation can be quantified using units such as rads and rems, which take into account the different biological effectiveness of various types of radiation. The Relative Biological Effectiveness (RBE) is a factor used to compare the biological damage caused by different radiations, as different types can cause varying amounts of damage even with the same energy dose.