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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 ...
artificial. The Sun is the most important natural source of light. Artificial sources of light are created by people. Objects that emit (give off) energy in the form of light are said to be For example, the Sun is luminous, and so is a burning candle. Objects that do not emit light, but only reflect light from other sources, are said to be ...
The Sun is the major source of light for the earth. The sun is a massive ball of fire, at the centre of which nuclear fusion produces massive energy. This energy comes out as heat and light.
The light we see can be divided into two categories: Light sources and reflected light. The sources of light can then be looked at in two sub categories: Natural light sources and artificial light sources. Both of these types of light sources can either come from hot sources or from cool sources. The organizer below will help you to follow this ...
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
PDF. These NO PREP Sources of Energy Picture Sort Worksheets give students visuals to practice identifying sources of light, heat, sound, artificial, and natural sources of light using pictures to sort cut, and paste.
SOURCES AND EFFECTS OF HEAT ENERGY STUDENTS’ LEARNING OUTCOMES After studying this chapter, students will be able to: þ Describe the sources and effects of heat. þ Explain thermal expansion of solids, liquids and gases. þ Explore the effects and applications of expansion and contraction of solids.
