Electromagnetic spectrum

Pocket Genius Science: Energy and forces – The EM spectrum

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Facts At Your Fingertips: Energy and forces – The EM spectrum Electromagnetic (EM) radiation is a form of energy that travels in waves at a speed of 186,000 miles (300,000 km) per second, which is the fastest speed in the universe. Different kinds of radiation make up the EM spectrum. All types of radiation except … Read more

Pocket Genius Science: Energy and forces – Electromagnetism

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Facts At Your Fingertips: Energy and forces – Electromagnetism An electrical current always produces a magnetic field around it. Electromagnets are made by passing electricity through a wire that has been wrapped around a piece of iron. Unlike permanent magnets, an electromagnet loses its magnetism as soon as the electrical current is switched off. How … Read more