Final answer:
An x-ray photon needs to enter the detector chamber, be absorbed by the detector material, and be converted to a measurable event in order to be measured.
Step-by-step explanation:
In order for an x-ray photon to be measured, it must go through a series of steps. First, the photon needs to enter the detector chamber. Then, it must be absorbed by the detector material. Finally, it needs to be converted to a measurable event, such as causing a change in the detector or generating an electric signal.
The process of measuring x-ray photons involves the interaction of photons with matter. The type of radiation, energy of the photons, and the number of photons that strike a given area all play a role in the detection process.