This makes the photocathode very efficient at creating photoelectrons from photons. Electrons emitted in this manner can be called "photoelectrons". When Auger electrons have lower energies than primary photoelectrons, they have shorter ranges. These photoelectrons in turn generate secondary electrons, which slow down before engaging in chemical reactions. The ejected electrons, known as photoelectrons, carry information about their pre-ionized states. EUV light generates photoelectrons upon absorption by matter. This technique has proved sensitive enough to detect single photoelectrons. Because of brief and intense exposure, many photoelectrons are created simultaneously. They are both related to poor efficiency of utilizing photoelectrons to create latent image centers. That is, photoelectrons may migrate to one of many sensitivity centers.