I have read that accelerating continuously dilates time in the frame of reference of the traveller asymptotically until reaching speeds near c. You read for example that the voyager could reach the center of the galaxy in just 27 years from his perspective: https://www.quora.com/How-long-would-it-actually-take-to-travel-40-light-years-given-time-moves-differently-at-high-speeds
But from the reference of a photon traveling at the speed of light, how much time has passed ? And I know those questions are far from graduate level physics but, one paradigm you learn in highschool describes photon as both particule and electromagnetic wave, with a certain frequency. Could you ask then, from the reference of the photon traveling at c, how many time did it oscillate from A to B ?
Does time exists in the reference of the photon or is it traversing the whole space "immediately" in its frame of reference ?
Thanks !