Electromagnet Why electromagnets work
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negatively charged particles. Electromagnets are used for a variety of purposes. In a simple example, an electromagnet can pick up pieces of iron, nickel...- Electromagnetism is one of the four fundamental forces of nature. The others are gravity, and the strong and weak interactions of particle physics. The...
Magnetism (section Electromagnets and electromagnetism)in a transformer. Electromagnets are used to make many things work like computers, televisions, radios and doorbells. Electromagnetic radiation including...- Microwave (category Electromagnetic radiation)microwave background radiation. We can only see electromagnetic radiation in the visible light spectrum (which is why it's called the visible light spectrum)...
- Ultraviolet (category Electromagnetic radiation)Ultraviolet is the part of the electromagnetic spectrum shown on the left side of the picture below as black—because humans cannot see light of such short...
Light is a form of electromagnetic radiation. It is the natural agent that stimulates sight and makes things easy to see. Light is the opposite of darkness...- symmetry). Particles can carry fundamental forces. For example, the electromagnetic force is carried by photons. The four fundamental forces are responsible...
- why perpetual motion machines do not exist and could never exist; it would break a fundamental law of physics. People can use the changes to do work that...
attempts at using another part of the electromagnetic spectrum to observe the sky. Those parts of the electromagnetic spectrum that the atmosphere did not...
how the particles that make up atoms work. Quantum physics also tells us how electromagnetic waves (like light) work. Wave–particle duality means that particles...- tries to model the four known fundamental interactions—gravitation, electromagnetism, strong nuclear force, weak nuclear force—together in one theory. This...
theory of special relativity. Einstein predicted that the speed of electromagnetic radiation through empty space would always be the same. His view of...
through the wires, carrying electrical energy. This process is called electromagnetic induction. Michael Faraday discovered how to do this. Many sources...- Halpern, Alvin, Erich Erlbach (1998). Beginning Physics II: Waves, Electromagnetism, Optics, and Modern Physics, pg. 50-56 The Earth and the Universe LIFEPAC...
Mobile phone (section How mobile phones work)Most also have a digital camera inside. Cell phones work as two-way radios. They send electromagnetic microwaves from base station to base station. The...- Computer (redirect from How does a computer work)general purpose electronic computer (since Konrad Zuse's Z3 of 1941 used electromagnets instead of electronics). At first, however, the only way to reprogram...
detected what they call the cosmic microwave background radiation. These electromagnetic waves are everywhere in the universe. This radiation is now very weak...
charge repel each other: this repulsion is part of what is called electromagnetic force. Unless there was something else holding the nucleus together...
attention in recent years. There are many inventions of new material. Work on why structures fail or break down is very important to engineering. The important...
Pulsars are neutron stars which spin rapidly and produce huge electromagnetic radiation along a narrow beam. Neutron stars are very dense, and have short...
