Thomas Young

Thomas Young (1773-1829) Thomas Young was a talented person. He was familiar with Latin, Greek, French, Italian, Hebrew, Arabic, Persian, when he was 14 years old. He has received various education and his colleagues call him Phenomena Young. British are interested in language, medicine, nature and light. He studied at London, Edinburgh and Göttingen and studied medicine in London. With a strong interest in perception, he can do a lot of recognition and discovery about the eyes.

Since the light outside the visible range was discovered and described by William Herschel (infrared) and Johann Wilhelm Ritter (UV), Thomas Young, Thomas Johann Seebeck et al., The concept of visible spectroscopy became clearer in the early 19th century . In 1802, Yang was the first person to measure the wavelength of the light of various colors. Many species can see light at frequencies other than the human "visible spectrum". Bees and many other insects can detect ultraviolet light, which helps them find honey in the flowers. Plant species that rely on pollination of insects may achieve reproductive success due to the emergence under ultraviolet radiation rather than human diversity. Birds can also see ultraviolet rays (300-400 nm), and some birds have ultraviolet visible visible gender markers in their feathers. However, many animals that can see the ultraviolet range can not see red light or other red wavelengths.

In 1802, British physician Thomas Young was keen to understand the nature of the light, and he made progress in solving this magenta puzzle. Young first proved that he can produce any color by mixing different proportions of the three primary colors. For example, you can mix two red light and some of the green light into orange. If you use green light rather than red light, you can see yellow-green light. Young further observed his observations: he assumed that the human eye perceives only the three primary colors of Newton, red, green and blue, and that the eyes perceive all color changes through internal integration. Even if neither red or blue light is in your eyes, you can "see" magenta, even if the light is not magenta. The combination of red and green gives a yellow feel, our eyes convert blue and green light to cyan.