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John Tyndall 1820-1893
John Tyndall provided an explanation for why the sun is the color it is at the horizon. He is noted for his study of scattering light by atmospheric particles. This phenomenon is sometimes called the Tyndall Effect. Tyndall's studies of the transmission of infrared radiation through gases and vapors did much to clarify the nature of the absorption process and brought him the Rumford Medal in 1869. He had other contributions to science which I will copy and paste into the assignment box. -
Tyndall and radiant heat and light
Tyndall examined the transmission of both radiant heat and light through various gases and vapors. He discovered that water vapor and carbon dioxide absorb much more radiant heat than the gases of the atmosphere and argued the consequent importance of those gases in moderating Earth’s climate. This is known as the greenhouse effect.
James, Crowther. “John Tyndall.” Biography, 1970, biography.yourdictionary.com/john-tyndall. -
Tyndall measures CO2
John provides a method to measure the amount of CO2 in our breath. He suggested that the Ozone layer is made up of oxygen in clusters the same year.
Graham, Steve. “John Tyndall.” NASA, NASA, 8 Oct. 1999, earthobservatory.nasa.gov/features/Tyndall. -
Tyndall's Apparatus for Particulates in the Air
Tyndall supported Pasteur's findings by devising a machine to demonstrate that air had the ability to carry particulate matter. His apparatus could be used to find out if air was pure because matter in air reflects light when the air is illuminated under special conditions. Tyndall finds that no organisms were produced when pure air was introduced into media capable of supporting the growth of microorganisms. These results along with Pasteur's findings put an end to spontaneous generation.