(n)British physicist (born in Ireland) remembered for his experiments on the transparency of gases and the absorption of radiant heat by gases and the transmission of sound through the atmosphere; he was the first person to explain why the daylight sky is blue (1820-1893), Syn.John Tyndall
(n)the phenomenon in which light is scattered by very small particles in its path; it makes a beam of light visible; the scattered light is mainly blue