How can light travel through space?
Light is an electromagnetic wave - also radio waves, infrared radiation that we feel as heat
But what is waving?
- Maxwell’s answer: Light is a wave in the “ether” .. an invisible, massless substance which permeates all space.
- Is this a “scientific” proposition?
- Science pursues the details relentlessly! All propositions must be tested and shown to be consistent or inconsistent with observations.
- More on this later - this is the beginning of the downfall of Newtonian physics