In 1857, Faraday got a letter from Maxwell on "Faraday's lines of force". It was both a thrill and burdong for the aging Faraday since he could not understand it. To Maxwell, the lines of forces were all geometry, but Faraday lacked the mathematical capacity to understand this. Enegized by these ideas, he vowed to return to the lab to prove electricity and magnetic effects take time to move through space. In 1857, Faraday asked Maxwell's opinion about his speculation and he replied saying it will work. Maxwell soon got hired at the kings college and that is where he and Faraday first met face to face. In 1861, Maxwell came up with a mathematical formula that predicted the speed at which such an electromagnetic wave would travel at through space.
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