Why can electromagnetic radiation travel through empty space?

Explanation:

Electromagnetic radiation is composed of electric and magnetic fields, altho most waves travle through mediums such as air or water witch take up space, lights medium takes up no space (electric and magnetic fields take up no space). saying that a magnetic field took up space would be like saying gravity took up space. When electric and magnetic fields interact in such a way they can start to oscillate and interact with each other to form light.

8 m/s because for him to get the same amount of energy as ray is putting out, bobby, who weighs half as much as ray, needs to run twice as fast.