For an explanation, see the main splats page
The principles of radiation
- To really understand the inner workings of electromagnetic radiation, we need to understand blackbody radiation, which is covered under 'quantum physics'.
- Many materials that appear opaque to us when we rely on the visible spectrum, are transparent at other wavelengths such as X-rays and ultraviolet radiation.
- In 1845, Michael Faraday found that light propagation in a material can be influenced by external magnetic fields (rotation of polarized light by magnetism).
- In 1850, Michael Faraday experimented to find the link between gravity and electromagnetism, but all his efforts failed, a situation that continues today.
- In 1861, James Clerk Maxwell set out his four laws of electromagnetic fields, proving mathematically that there was such a thing as electromagnetic radiation.
- In 1864, James Clerk Maxwell published on his dynamical theory of the electromagnetic field, and his equations of electromagnetic wave propagation in the ether.
- In 1873, James Clerk Maxwell published his Treatise on electricity and described the electromagnetic nature of light and predicted radio waves.
- In 1883, George FitzGerald developed a theory of radio transmission, and explained how to create electromagnetic waves such as radio waves, but did not do so.
- In 1894, Heinrich Hertz reported that radio waves travel at speed of light and can be both refracted and polarized. He had measured their wavelength in 1888.
- In 1879, Joseph Stefan pointed out that the total radiant flux from a black-body is always proportional to the fourth power of its temperature.
- In November 1895, Wilhelm Röntgen discovered some of the effects of X-rays, and spent almost two months identifying as many of their other effects as possible.
- Cherenkov radiation is produced as bright flashes when high speed particles enter a medium, travelling faster than the speed of light in that medium.
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