Light 0.0 / 5 ? ScienceLightYears 7-9 (KS3)AQA Created by: Michael EzeCreated on: 11-11-23 18:33 Who invented light? Humphry Davy 1 of 19 What year was light invented? 1802 2 of 19 What is light? a type of electromagnetic radiation that allows the human eye to see or makes objects visible. 3 of 19 What is electromagnetic radiation? waves that are created as a result of vibrations between an electric field and a magnetic field 4 of 19 What is a vibration? quickly moving back and forth (or up and down) about a point of equilibrium 5 of 19 What is an equililbrim? a state in which opposing forces are balanced? 6 of 19 How fast is light? 186,000 miles/sec 7 of 19 How fast is electricity? about 270,000 km/s 8 of 19 What is electricity? a low-resistance connection between two conductors (objects that allow electricity to flow through them) that are supplying electricity to a circuit 9 of 19 What is an conductor? is a substance or material that allows electricity to flow through it. 10 of 19 What is a volt? a unit of measurement for electromotive force, 11 of 19 What is the definition of electromotive? pertaining to, producing, or tending to produce a flow of electricity. 12 of 19 How many volts does a torch have? 3 volts (9 watts) 13 of 19 What are watts? the standard unit of power 14 of 19 What is energy measured in? Joule (J) 15 of 19 What are lumens? measure how much light you are getting from a bulb. 16 of 19 What is light made of? Photons 17 of 19 What are photons? a tiny particle that comprises waves of electromagnetic radiation. 18 of 19 What is the main source of Energy? The Sun 19 of 19
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