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discovery of infrared rays
Most encyclopedias and physics books credit the great British astronomer Sir William Herschel with the discovery of infrared radiation in 1800. -
discovery of UV rays
In 1801, Johann Ritter conducted an experiment to investigate the existence of energy beyond the violet end of the visible spectrum. Knowing that photographic paper would turn black more rapidly in blue light than in red light, he exposed the paper to light beyond violet. -
discovery of the electromagnetic spectrum
In 1867, James Clerk Maxwell predicted that there should be light with even longer wavelengths than infrared light. In 1887 Heinrich Hertz demonstrated the existence of the waves predicted by Maxwell by producing radio waves in his laboratory. -
discovery of radio waves
Heinrich Hertz proved the existence of radio waves in the late 1880s. He used a spark gap attached to an induction coil and a separate spark gap on a receiving antenna. -
discovery of the photoelectric effect
In 1887, German physicist Heinrich Hertz noticed that shining a beam of ultraviolet light onto a metal plate could cause it to shoot sparks. -
discovery of X-rays
X-rays (Roentgen-rays) were discovered on the 8th of November, 1895 by the German physicist Wilhelm Conrad Roentgen. Fifty days after the discovery of X-ray, on December 28, 1895. -
discovery of Gamma rays
French chemist Paul Villard first identified gamma rays in 1900 from the element radium, which had been isolated by Marie and Pierre Curie just two years before. -
development of the Wave-Particle Duality Theory
In 1923, Louis de Broglie, a French physicist, proposed a hypothesis to explain the theory of the atomic structure.By using a series of substitution de Broglie hypothesizes particles to hold properties of waves. -
discovery of the microwave
The microwave was invented accidentally in 1945 by a self-taught engineer named Percy Spencer, who was leading a radar project for the defence giant, Raytheon. While testing a new vacuum tube called a magnetron, he discovered that a chocolate bar in his pocket had melted from the heat. -
Wave theories and discoveries in today's life
When you're listening to music or watching a video. Going to the doctors or anything like that. The waves are everywhere and you can't escape them.