I want to know the types of Fire Extinguishers and not the classes of fire(A,B).There are about ten types but i'm not able to find all on the web.
whenever your hands feel cold. if they turn pale/blue or if you cant feel anything anymore you probably shouldve put them on earlier.
if u specify your class next time i can give a better explanation regarding that. but this's the explanation. as you know, an object appears coloured iff it absorbs light of all wavelengths except that particular one. i think the answer for your question becomes that good absorbers are good emitters of light. hope this helps
