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John Tyndall (/ ˈ t ɪ n d əl /; 2 August 1820 – 4 December 1893) was an Irish physicist.His scientific fame arose in the 1850s from his study of diamagnetism.Later he made discoveries in the realms of infrared radiation and the physical properties of air, proving the connection between atmospheric CO 2 and what is now known as the greenhouse effect in 1859.
Tyndallization is a process from the nineteenth century for sterilizing substances, usually food, named after its inventor John Tyndall, that can be used to kill heat-resistant endospores. Although now considered dated, it is still occasionally used.
Named after John Tyndall, tyndallization [23] is an obsolete and lengthy process designed to reduce the level of activity of sporulating microbes that are left by a simple boiling water method. The process involves boiling for a period of time (typically 20 minutes) at atmospheric pressure, cooling, incubating for a day, and then repeating the ...
Tyndall said in 1864, "a long series of experiments enables me to state that probably no two substances at a temperature of 100°C emit heat of the same quality [i.e. of the same spectral profile]. The heat emitted by isinglass, for example, is different from that emitted by lampblack, and the heat emitted by cloth, or paper, differs from both."
Tyndall's bar breaker is a physical demonstration experiment to demonstrate the forces created by thermal expansion and shrinkage. It was demonstrated 1867 by the Irish scientist John Tyndall in his Christmas lectures for a "juvenile auditory".
The Tyndall effect is light scattering by particles in a colloid such as a very fine suspension (a sol). Also known as Tyndall scattering , it is similar to Rayleigh scattering , in that the intensity of the scattered light is inversely proportional to the fourth power of the wavelength , so blue light is scattered much more strongly than red ...
This is known as the Tyndall Effect. When sunlight passes through the atmosphere the light is scattered by small particles suspended in the atmosphere. The blue light that we see is known as Tyndall Blue. [3] John Tyndall developed a practical demonstration of the propagation of light though a tube of water via multiple internal reflections.
After 1852 the publication continued in two series: Natural Philosophy, edited by J. Tyndall and William Francis; and, Natural history, edited by Arthur Henfrey and Thomas Henry Huxley. Volume 3 (1843) is noteworthy because it contained Ada Lovelace 's notes appended to her translation of Luigi Federico Menabrea 's article. [ 1 ]