I was referring to a certain fictional character that can do said things. Of course, it defies out laws of physics, but he's not really subjected to all of them.The world that he exists in completely deviates from real life aside for some basic similarities. So I was wondering about things that might affect his ability, but the viewer cannot confirm(like the speed of his light in a medium).

Thank you! I have a couple more questions, If I may. They're related to a fictional character(which was what drove me to post this thread). He can turn into light itself and/or shoot light based attacks. His attacks pack so much energy they casually pierced through solid objects or go as far as creating massive explosions. Does it change the rules? Could his light be simply obliterating atoms in the way instead of having them slow it down? Also, in his photons state, could he use already existing sunlight to travel without interruption at full speed, as if he were in a vaccum?

Thank you! And let's say said fictional character turns into photons in broad day light, can it travel through the wavelength of the light produced by the sun without "slowing down"?

Pardon my ignorance, I'm not that good with physics terms. I'm simply referring to if it's possible for him while in his photons state to use already existing, natural light produced by the sun to avoid interactions and travel as if he's in a vaccum. I know it probably depends on many variables, but since no further information is available, I can only assume there's air getting in his way, that's about it, unfortunately.

Thank you so much! So, photons do move at a constant speed, but their interactions while traveling just stall them, thus, they are technically slowed down in a sense that they take more time to cover said distance than if they didn't have to interact with anything. Hopefully I got that right. But I've got one more question, regarding a fictiona scenario: Let's say a man can turn into photons and travel, could he perhaps use the wave lenght of the sunlight to avoid interaction nad bypass the absorption effect? I'm probably talking out of my behinds, but figured I'd ask even if it's silly.

I see. Albeit, the refraction in air molecules(which is what he travels through most of the time)is quite negligent, though, isn't it? Also, could it be possible for him to overcome said effect by traveling through/via light produced by the sun itself?

This question popped to mind due to a silly discussion I had over fiction. One character can launch light based attacks and turn into photons, so the question raised is: do the air molecules in his way decrease his speed by a small margin or does he travel at top speed by default? Just to be clear: I've got no real in-depth knowledge of physics. English is also not my first language, so I might have hard time understanding some explanations. In fact, we weren't even taught physics at school(go figure).