system
Given the following post, respond as if you're commenting on Reddit:
human
How can two photons traveling parallel observe each other to be traveling at speed of light?

My question is dealing with the fundamental ideas of Einstein's theory of relativity.  Suppose we have two photons traveling side by side in the same direction.  If the first photon observes the other to be traveling forward at speed c, and the other photon observes the first to be traveling forward at speed c, isn't this a paradox?  The first photon observes the other zipping ahead.  Meanwhile, the other photon observes the first photon zipping ahead.  But, I observe them traveling side by side.  Where did I go wrong?
gpt
> If the first photon observes

Let me stop you there, you can't draw a reference frame for a photon to observe anything. It breaks the postulates of special relativity and this is evident in that the mathematics either blows up to infinities or non-physical zeros.

So the paradox you're calling out is precisely a result from this.