Question

question 2 / 40
exposure time is the amount of time that:
electrons are flowing through the filament
electrons are flowing through the x - ray tube
is required for photons to travel from the x - ray tube to the patient
is required for photons to dissipate in the examination room
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Explanation:

Exposure time in x - ray imaging is the time during which electrons are flowing through the x - ray tube, which in turn generates x - rays. Electrons flowing through the filament is related to thermionic emission but not the exposure time itself. The travel time of photons from tube to patient and their dissipation time are not what exposure time refers to.

Answer:

Electrons are flowing through the x - ray tube