Is radiation intensity inversely proportional to the square of the distance from the source?

Radiation intensity is indeed inversely proportional to the square of the distance from the source, a principle commonly known as the inverse square law. This law states that as you move further away from a point source of radiation, the intensity of that radiation decreases with the square of the distance. It is a fundamental concept in physics that applies to various types of radiation, including gamma rays, X-rays, and other forms of electromagnetic radiation.

This relationship arises because as the distance from the source increases, the same amount of radiation is spread over a larger area, resulting in a decrease in intensity. For instance, if you double the distance from the source, the intensity is reduced to one-fourth of its original value.

Thus, the correct answer confirms the general applicability of this principle across different types of radiation, ensuring a consistent understanding of how distance affects radiation exposure. The other choices incorrectly limit this relationship to specific types of radiation or suggest it might not hold true broadly.