# Electromagnetic Field

## Maxwell's Equations

A description of the field from a current which changes in time is much more complicated, but is calculable owing to James Clerk Maxwell (1831–1879). His equations, which have unified the laws of electricity and magnetism, are called Maxwell's equations. They are differential equations which completely describe the combined effects of electricity and magnetism, and are considered to be one of the crowning achievements of the nineteenth century. Maxwell's formulation of the theory of electromagnetic **radiation** allows us to understand the entire **electromagnetic spectrum**, from **radio waves** through visible **light** to gamma rays.

## Additional topics

Science EncyclopediaScience & Philosophy: *Dysprosium* to *Electrophoresis - Electrophoretic Theory*Electromagnetic Field - Superposition Of Fields, The Dipole Field, Magnetic Fields, Electromagnetic Fields, Maxwell's Equations - Electric fields, The field of a line of charge