Let's consider 2 photons of the same frequency 𝛎.
Is it possible to consider the following situation (of very low probability and certainly nearly impossible to produce, consider this as a theoretical experiment if you prefer): these 2 photons are in the exact same position, following the same strait line at speed c, and have opposite phases.
Is it valid to consider the frequency and the phase of a single photon?
Will there be any kind of interaction between these 2 photons?
What will the result look like in term of wave signal?
Will this be looking like an electro-magnetic signal of amplitude 0, with an energy of 2h𝛎?