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.
Beakman explains how microwaves work by first explaining what electromagnetic energy is, that it travels in waves, and how to measure wavelength. He then using an animation clip to show how a microwave works to heat up water.
Beakman explains the history behind magnets and the difference between magnets and electromagnets. They then walk through making an electromagnet and demonstrate that the magnetic energy in the nail comes from the battery and isn't inherent in the nail. Beakman explains that the inherent energy separates electromagnets from regular magnets. Beakman then mentions some ways in which electromagnets are used in the world today.