>The photons, each about two centimeters long, emerge at the end of an optical fiber. this is a use of the term "photon" i haven't come across before.... anyon

>The photons, each about two centimeters long, emerge at the end of an optical fiber. this is a use of the term "photon" i haven't come across before.... anyone have time for an ELIF how there are "2cm long photons"?