Electromagnetic Radiation


 
 
Concept Explanation
 

Electromagnetic Radiation

When an electric current flows in a wire, a magnetic field is generated around the wire. This field can be detected by placing a magnetic compass near the wire.Similarly, moving a magnet inside a coil of wire generates an electric field. This field will cause the electrons in the wire to move producing an electric current. The interaction between electricity and magnetism is called electromagnetism.

The Scottish scientist James Clerk Maxwell(1831 - 79) suggested that a changing electric field could create a changing magnetic field, which would is turn create a changing electric field. These fields would continue to generate each other. He proposed that fields traveled through space as transverse waves at right angles to each other. This is the structure of an electromagnetic wave.Electromagnetic waves are generated naturally in our upper atmosphere and from stars, including our Sun, Visible light, microwaves and X -rays are examples of electromagnetic radiation.

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