*Currently enrolled in University Physics 2* We have not covered the topic pertaining to light yet, but we are working with sinusoidal waves. I would like to better understand the motion of light in space. It is my understanding that light moves in the form of waves, so what causes the wave motion? The waves we've been working with in class have involved waves within a certain medium and of course we exist within a medium, but how do waves, particularly light waves, for this motion in a vacuum? Is it a result of the electromagnetic fields that exist throughout space that cause this wave-like motion? Please forgive any "ignorance" in my question--I don't have a complete grasp on either topic yet. Thank you.