Final answer:
The process during CR imaging plate processing in which a laser stimulates trapped electrons to return to a lower energy state by emitting light is known as c)photostimulated luminescence.
Step-by-step explanation:
During CR imaging plate processing, the laser facilitates a process where trapped electrons are released and return to a lower energy state. This process is known as c)photostimulated luminescence.
The photostimulated luminescence is different from phosphorescence, in that it involves stimulating electrons in a metastable state to decay by emitting light when they are hit by photons from the laser. Unlike phosphorescence, photostimulated luminescence typically occurs much faster and is specifically induced by the laser during the image processing in computed radiography.