Electromagnetism 101 | National Geographic (3:19)
Electromagnetism is one of the four fundamental forces of nature. Learn about the relationship between electricity and magnetism, the different wavelengths on the electromagnetic spectrum, and how an invisible force protects our entire planet.
Forces of Nature (3:24)
Introducing the four main forces of nature: gravity, electromagnetic force, and the weak and strong nuclear forces. Learn why they are fundamental to life on Earth.
