@honey.mustard What about the case where EM wave travels at speed lower than c like inside a medium? We can talk then about a frame of reference where B field vanishes!

I am trying to understand how EM wave propagates in a vacuum, my old understanding was wrong (self generating E & B fields), so I am left with 2 options to explain it: space is the medium that carry the wave and it is not empty (I read something about that), or that photons truly travel as particles.

@honey.mustard good point

Good answer. Can you expand your answer to explain how the EM wave travel (instead of self generating fields)? Regarding frames of reference what about EM wave travelling at speed less than c like inside a medium?

I am interested for answer to this too, nobody has an explanation to this. It might be just problem with images processing at such high rate I am not sure about it.

So your short answer to my question "It doesn't need it per se. And it doesn't have a purpose per se". For me I can't imagine the assistance of any physical phenomenon for no purpose, there must be a strong reason why superposition is a reality!

But in QM we are not talking about real waves when describing the quantum states of a particle, but more about probabilities waves.

But doesnt an atom stay atom after measurement or interaction with external forces (wave function collapse)?.. Also you are giving examples of applications that exploits superposition phenomenan to explain why the universe cannot exist without it!

You understand my question but you are avoiding answering it directly. read @userLTK comment on my question.

@userLTK exactly!

Verifying superposition through experiments is not my question. My question is deeper than that. Imagine a world without superposition were every state is determined from initial condition, physics laws will work just fine!