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Definition
| The form of energy we can see. |
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| A non human made source of light, such as the Sun |
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| to send out energy in the form of waves or rays. |
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| The transfer of radiant energy, such of light. |
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| energy transferred or emitted waves or rays in all directions. |
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| A man made source of light |
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| incandescent source of light. |
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| an object that can be heated to an extreme temperature, that causes it to emit visible light. |
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Definition
| The emission of visible light by a hot object. |
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| the process in which high energy, invisible ultra violet light is absorbed by the particles of an object, which then emits some of this energy as light causing the object to glow. |
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Definition
The persistent emission of light following ecposure to and removal of a source of radiation.
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| the emission of light resulting from chemical action and not involving heat. |
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| The emission of light produced by chemical reactions inside the bodies of living creatures. |
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| an object that does not give off its own light. |
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The amount of energy transmitted by one thousand watts of power in 1 hour.
a unit of electrical energy. |
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| A model of light based on the observation that light travels in a straight line. |
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| A single line or narrow beam of light that originates from a light source and that may bounce off a surface that is strikes. |
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| a representation of the path of light by using a straight line with an arrow. |
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Definition
| allowing light to pass through . |
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Definition
| allowing some light to pass through. Altho the light is scattered from its straight path. |
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Definition
| Allowing no light to pass through. |
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