Wave+Theory+of+Light



First one who found about that light was made out of waves was Sir Isaac Newton. In 17th century he declared that light was corpuscular, that it is also made out of particles. In 19th century Thomas Young, another scientist found that light waves are patterns of light produced when light passed through a small slit, they received a blow of waves. The narrow slit today is known as diffraction, these two observations were the evidence that light must be a wave. Later it was proved that light is supposed to be a wave, it was proved by Fresnel who was also a scientist. In the middle of the 19th century James Clark Maxwell came up with some brilliant equations today know as Maxwell equations, which then proved that electricity and magnetism are not two different phenomena that they are also integrally inter-related. His equation was that there should be some kind of wave that has a lot of special interlocked patterns of oscillating and magnetic fields. One of them was such as electromagnetic waves, which was found that actually exist. Maxwell calculations were yield for results of its speed, which was found that was the same as the speed of light, but he did some more experiments to prove that. But at first time scientist demolished the views in the their minds of some Newton’s theory's which were finally accepted by scientist by the solid evidence. However about twenty years later it was found that when light is shined on a surface of a metal, beams that are negatively charged particles are ejected from the surface of the metal, this was a stunning discovery that was made by the scientist, this experiment could not be explained. So in 1899 Philip Lenard explained the observation by saying that negatively- charged beams that are made of electrons which were discovered before by J.J. Thompson in 1897. Some more people scientist that explained it before were Max Plank and Albert Einstein. Shows that scientist work together to prove and help each other on their discoveries and experiments. The prove for this was when Sir Isaac Newton could not prov it James Clark Maxwell proved it by his equations.
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Reference: (n.d.). Retrieved from http://library.thinkquest.org/C006027/html-ver/hist-back.html

By :Yelena Dotsenko