The largest giant squid recorded by scientists measured 43 feet (12 meters) long, according to Smithsonian's National Museum of Natural History. Faked photo of a giant squid supposedly found In California. An image of a monster 160-foot-long (49-meter-long) giant squid made the social media rounds yesterday, but fear notâit's a hoax.
luminescence - light not due to incandescence; occurs at low temperatures. light, visible light, visible radiation - (physics) electromagnetic radiation that can produce a visual sensation; the light was filtered through a soft glass window.
Chemiluminescence (sometimes  chemoluminescence ) is the emission of light (luminescence), as the result of a chemical reaction.There may also be limited emission of heat. Given reactants A and B, with an excited intermediate â ,t is the antithesis of a photochemical reaction, in which light is used to drive an endothermic chemical reaction. Here, light is generated from a chemically exothermic reaction. A standard example of chemiluminescence in the laboratory setting is the luminol test.