Final answer:
Radiation exposure decreases with time is false, decreases with distance is true, and increases with intervening material is false; occupations in radiology and nuclear energy may lead to increased exposure.
Step-by-step explanation:
Regarding radiation exposure and safety:
- Question 1: Radiation exposure decreases with exposure time. This statement is False.
- Question 2: Radiation exposure decreases with increasing distance from the source. This statement is True because the intensity of radiation follows the inverse square law; as the distance doubles, the exposure falls by a factor of four.
- Question 3: Radiation exposure increases with increasing intervening material. This statement is False; additional intervening material generally provides shielding, which reduces exposure.
Occupations that may cause an increase in radiation exposure include those in radiology, nuclear power plant operation, and any industry where radioactive materials are used or waste is processed.