Adriano de Paiva (1847–1907) was a Portuguese

scientist A scientist is a person who Scientific method, researches to advance knowledge in an Branches of science, area of the natural sciences. In classical antiquity, there was no real ancient analog of a modern scientist. Instead, philosophers engag ...

who was one of the pioneers of telectroscope. He worked at the Politechnical Academy of Porto and conducted research into

selenium Selenium is a chemical element; it has symbol (chemistry), symbol Se and atomic number 34. It has various physical appearances, including a brick-red powder, a vitreous black solid, and a grey metallic-looking form. It seldom occurs in this elem ...

as a material to transmit

image An image or picture is a visual representation. An image can be Two-dimensional space, two-dimensional, such as a drawing, painting, or photograph, or Three-dimensional space, three-dimensional, such as a carving or sculpture. Images may be di ...

s. His work followed the discovery of

photoconductivity Photoconductivity is an optical and electrical phenomenon in which a material becomes more electrically conductive due to the absorption of electromagnetic radiation such as visible light, ultraviolet light, infrared light, or gamma radiation. ...

Willoughby Smith Willoughby Smith (6 April 1828, in Great Yarmouth, Norfolk – 17 July 1891, in Eastbourne, Sussex) was an English electrical engineer who discovered the photoconductivity of the element selenium. This discovery led to the invention of photoele ...

in 1873. In the 19th century he suggested the use of a chemical that would enable images to be transmitted at a considerable range.

References

* Adriano de Paiva,

* A small article concerning Portuguese scienc

Portuguese physicists Television pioneers 1847 births 1907 deaths People from Braga Videotelephony {{Europe-tv-bio-stub