Secchi disk [SEP] discoverer or inventor
Secchi disk
The Secchi disk, as created in 1865 by Angelo Secchi, is a plain white, circular disk in diameter used to measure water transparency or turbidity in bodies of water. The disc is mounted on a pole or line, and lowered slowly down in the water. The depth at which the disk is no longer visible is taken as a measure of the transparency of the water. This measure is known as the Secchi depth and is related to water turbidity. Since its invention, the disk has also been
in the spectra of some stars made him the discoverer of carbon stars, which made one of his spectral classes.
Other scientific and technical work.
Secchi was active in oceanography, meteorology, and physics, as well as astronomy.
He invented the Secchi disk, which is used to measure water transparency in oceans, lakes and fish farms. He studied the climate of Rome and invented a "Meteorograph" for the convenient recording of several categories of weather data. He also studied the aurora borealis, the effects