Each of the following statements is true except one. Which one is the exception?
◦ The invisible image on an x-ray film is called the "latent image."
◦ Silver halide in the emulsion is primarily silver bromide.
◦ The function of the gelatin in film emulsion is to keep the silver halide crystals evenly suspended over the base.
◦ During exposure, the x-rays strike and ionize all silver halide crystals on the film.