One of the questions that surprisingly puzzled me today is ‘why does light travel at a constant speed’. I mean I understand it is empirically observed but why and how? Like, how can the photons only travel at an absolutely fixed speed? There are so many magnetic waves etc around the environment – not a single photon gets affected by anything and speed up or down by a single nanometer.
Well I am sure there is a good simple answer to that somewhere. Or maybe we as humans are just limited by what we know so far. There could be ways to speed down the light and use it for other applications. Just a random thought!