Discuss the below:
Exposure and the Inverse Square Law
Q: The inverse square law has very practical applications.
a) If the exposure at d=30 cm from a point source is 1R, what is the exposure at d=5c from the source?
b) Suppose an acceptable chest radiograph was taken using 30mAs at 80kVp from 1m. Suppose that it was now requested that one be taken at 1.5m at 80kVp. What mAs setting should be used to yield the same exposure.