A radiographer stands 4 ft (1.22 m) from the head of the patient while exposing a dental radiograph. Her personnel monitoring device measures the radiation dose at that position to be 0.04...

A radiographer stands 4 ft (1.22 m) from the head of the patient while exposing a dental radiograph. Her personnel monitoring device measures the radiation dose at that position to be 0.04 millisievert (mSv). The radiographer decides to move to a new location 8 ft (2.44 m) from the head of the patient. What is the dose at the new location?

a. 0.01 mSv

b. 0.02 mSv

c. 0.08 mSv

d. 0.16 mSv