Question

decreasing the source - to - image distance (sid) will result in which of the following?
increased production of photons
decreased concentration of photons
increased concentration of photons
decreased production of photons

Explanation:

The intensity of photons at the image - plane is inversely proportional to the square of the source - to - image distance (SID) according to the inverse - square law. When SID decreases, the same number of photons are concentrated over a smaller area, leading to an increased concentration of photons. The production of photons is determined by the source itself and is not affected by SID.

Answer:

Increased concentration of photons