What is latent image formation?
When the x-ray beam passing through the patient and including the radiographic intensifying screen. The intensifying screen deposit the visible light in the emulsion. The light interact with the silver halide crystal. After exposure, no image can be observed on the film. An invisible image is present and is called latent image. After chemical processing the latent image converted into visible image. The latent image is the invisible change that is induced in the silver halide crystal.
The interaction between photons and silver halide crystal is the processing of the latent image into the visible image. This types of formation of latent image is called photographic effect. And the whole process is called Gurney Mott theory.
Fig:- Formation of latent image.