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Light sources can be divided according to different criteria: Natural light sources that are all the time or occasionally present in nature without human intervention. Artificial light sources that were introduced by humans because of certain advantages. The most famous natural source is the sun, the most famous artificial source is ...
Discover: What do I know, think, and feel about energy sources on Earth? Understand: What are some different perspectives related to energy sources? Act: What are the characteristics of sustainable energy?
describe various types of sources of energy e.g. fossil fuels, water, wind, biomass, sea, geothermal, nuclear energy; recognise that the sun is the ultimate source of energy;
NEL 10.1 Light Energy and Its Sources 291 Thermal energy can heat a metal to such a high temperature that it emits light. This light ranges from dull red to yellow to white and blue-white as the metal gets hotter. The colour of the emitted light indicates when the molten metal is ready to be poured. Light from Phosphorescence
Energy: Electricity, Heat, and Light. The properties of electricity will be discussed and demonstrated with a Tesla coil and a simple generator allowing the students to turn kinetic energy into electricity. Chemical reactions to make electricity, heat and light will also be performed.
Nature of light: Light is a form of radiant energy. Various forms of incandescent bodied are the sources of light and the light emitted by such bodies depend upon the temperature of bodies. Heat energy is radiated into the medium by a body which is hotter than the medium surrounding it. The heat of the body, as seen, can be classified as red hot or
identify a number of ways of obtaining the energy needed to do something; discuss where their own energy comes from; list different sources and forms of energy that could be used to replace electrical appliances; evaluate different ways of obtaining electrical energy.
