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Definition
The unit of luminous intensity approximatley equal to the horizontal light output from an ordinary candle |
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The unit of lumenous flux equal to the flux in a unit solid angle of one sterasian from a uniform point source of one candelpower |
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The density of luminous flux incident on a surface in lumens per unit area |
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the luminous flux per unit os projected area and unit solid angle leaving a surface, eather reflected or transmitted Is sometimes called brightness |
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| What is luminous intensity |
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Definition
| a solid andular flux density in a given direction measured in candlepower pr candels |
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What are the varibles in light levels |
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| What sre the four considerationd in light Quality |
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Definition
1. glair 2. contrast 3. uniformity 4. color |
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What are two types of glare |
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Definition
| when a light source in the field or visioncouses discomfort and interforence with visual task |
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| Visual Confort Probability |
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| Occures when a light source is reflected from a viewed surface into the eye |
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| What is veiling reflection |
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Definition
| a complex interaction of light source and brightness, position of the task, reflectivity of the task, and position of the eye |
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| What is contrast when reffering to lighting |
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Definition
| the difference in illumination level between one point and nearby points |
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| What is uniformity when taking about lighting |
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Definition
| Affects a persons perception of a space as geing comfortable and pleasant to be in |
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Definition
| is complex subject but it can affect peoples comfort and their inpression of an environment |
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