John Ambrose Fleming
John Ambrose Fleming
Sir John Ambrose Fleming FRSwas a British electrical engineer and physicist. He is known for inventing the first thermionic valve or vacuum tube. He is also famous for the left hand rule. He was born the eldest of seven children of James Fleming DD, a Congregational minister, and his wife, Mary Ann, at Lancaster, Lancashire and baptised on 11 February 1850...
NationalityEnglish
ProfessionInventor
Date of Birth29 November 1849
John Ambrose Fleming quotes about
imagination evolution theory
The evolution theory is purely the product of the imagination.