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? How fast does light travel? Light travels extremely fast. In air or a vacuum, the speed of light is 186,400 metres per second. (300,000 kilometres per second). At this speed, it takes just over 8 minutes for light from the Sun to reach the Earth. Light waves   Previous: Back Book: 1001 Section: Science and Technology Chapter: Heat and Light