If there was no light in the universe, why would it fall apart?PerfectPhase said:
The photon is not the medium like air is to sound, it's the force carrier for the electromatic force. Every time an electron transitions to a lower energy state, it emits a quanta of enery, a photon. Therefore you could not remove the medium light travels in, you'd have to remove light it's self at which point the universe falls apart