1001 Space Earth Nature History Human World Science and Technology Chemistry Materials Force and Energy Heat and Light Electricity and Magnetism Industry Machines Electronics and Computers Cars and Trucks Railways Ships Aircraft Fishing and Agriculture Undersea Exploration

Choose a Page:What happens when colours are mixed?How does the Sun produce light?What is light?How does a vacuum flask work?What is heat?What is colour?How does heat travel?What is temperature?How do thermometers work?*What is the coldest possible tempe...*How fast does light travel?How do our eyes detect light?How do glasses work? What is the coldest possible temperature? The coldest temperature is absolute zero. It is zero on the Kelvin scale, which is equal to -273° Centigrade. Scientists have not yet been able to cool a substance to this temperature.   Previous: Back Book: 1001 Section: Science and Technology Chapter: Heat and Light