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Michael Faraday
1831· Person
ProvenTested many times; part of working physics.
English experimental scientist (1791–1867), largely self-taught, who discovered electromagnetic induction and invented the idea of fields.
See it on the Science map →How it works
Faraday left school at 13 and trained as a bookbinder before becoming Humphry Davy's lab assistant. In 1831 he showed that a moving magnet makes electric current flow in a wire: induction. He built the first electric generator, a spinning copper disc, and early motors. Lacking advanced math, he pictured invisible 'lines of force' filling the space around magnets and charges, the seed of the modern field concept.
Why it matters
Every power-plant generator and transformer runs on induction. His field idea became the central concept in all of modern physics.
How the work held up
His induction experiments were easily repeated and immediately put to use. Maxwell turned his lines of force into precise equations in the 1860s, and Hertz confirmed the predicted waves in 1887–1888.
Still a mystery
He searched for a link between gravity and electricity and never found one. Unifying gravity with the other forces is still unsolved.
Connections (2)
▸Michael Faraday invented the idea of Fields: what everything is made ofProven
The relationship
Faraday saw iron filings arrange into curved lines around magnets and concluded the space itself carried something real: 'lines of force'. Instead of objects acting at a distance by magic, each charge or magnet fills the space around it with a condition that other objects feel. That condition is what physicists now call a field.
How the link was found
Michael Faraday, through experiments at the Royal Institution in London from the 1830s, set out in his 1852 paper on lines of magnetic force. He had no formal math training.
Why it's proven
James Clerk Maxwell turned Faraday's picture into equations (1855-1865) that predicted light. Hertz's radio waves in 1887 showed fields carry energy through empty space.
Open questions and mysteries
What a field 'is', underneath the math, is still debated: a real substance, or just a bookkeeping device that gives correct answers?
▸Michael Faraday discovered induction for Electromagnetism (Maxwell's equations)Proven
The relationship
Faraday showed that a changing magnetic field drives an electric current, the reverse of Ørsted's 1820 finding that current produces magnetism. This two-way link meant electricity and magnetism form one interacting system. His picture of fields filling space gave Maxwell something to turn into equations, and induction became one of the four.
How the link was found
Faraday, at the Royal Institution in London, in August 1831, using an iron ring wound with two coils, then a magnet pushed into a coil.
Why it's proven
Induction is directly measurable and powers every generator and transformer. Maxwell's equations, built on it, predict experiments precisely.
Open questions and mysteries
Faraday's 'lines of force' raised the question of whether fields are real things or just bookkeeping. Modern physics treats them as real, but the debate shaped physics for decades.