Term
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Definition
| clear skies sun distance from earth gives daylight directionaltiy |
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Term
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Definition
| overcast and light rays reflect off of the dome of the sky |
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Term
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Definition
density of luminoos flux recieved by a surface
a num value on a surface how much light is hitting that surface
measured in fc
symbol e |
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Term
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Definition
is a percentage of a ration b/t how much light gets indoors from outside
illuminance of location inside divided by illuminance outside |
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Term
| electromagnetic radiation |
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Definition
made up of oscilating quanta of enrgy
sources- both natural and man made
- anything w/ a temp above absolute 0
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Term
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Definition
is the visible part of electormagnetic radiation made by oscilating quanta of enrgy
in between infared and ultraviolet |
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Term
| earths atmosphere energy balence |
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Definition
energy recieved from sun equals the amount of energey earth looses
energy from sun gets absobed in green house gasses and the earth is reflected from the green house gasses and the earth
the earth gives off energy some is reflected back into th earth from the green house gasses |
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Term
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Definition
| light changes direction when it moves from one medium to another (like through the atmosphere) |
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Term
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Definition
light wavelenghts travel at dif. speads when they move thru matter and bend some bend more sharply at the transition
more color def occurs when light is bent twice |
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Term
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Definition
sunlight is white- sky appears blue on clear day
wavelenghts react dif to particles in atmosphere short wave lengths scatter--- blue
sunrise/ sunset the angle is lower and most blue light is bent away from the eye |
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Term
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Definition
| laminated glass with metalic layers the color reflected is affected by the angle of the glass to the light |
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Term
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Definition
heath and happiness- connect to nature, productivity, sad
enviornment- orientation, wayfinding, visual contact
task needs- activites |
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Term
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Definition
contrast of task to background
size and visual ability
time - slow/ fast motion |
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Term
| illuminance guidelines for a task based on |
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Definition
age accuracy and context
brightness ratio
contrast
glare
reflected glare
size of task
duration |
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Term
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Definition
| context at room scale...brightness of the tast target compared to the surounding |
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Term
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Definition
context to task scale
relation b/t brightness and color of obj to its imediate suroundings |
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Term
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Definition
| harsh uncomfortable bright light source of reflected interfers with visula perception |
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Term
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Definition
| is glare at mirror angle to viewing zone |
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Term
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Definition
measures the amount of light passing through a material
direct
spread
diffuse
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Term
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Definition
device used to redirect light
light rays change direction when passing form one medium air to another (glass/plastic) |
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Term
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Definition
process by which light is dissipated usually by heat
used up |
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Term
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Definition
is the percentage of the light on a surface which is reradiated
dep on angle of icidence
qualites of surface |
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Term
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Definition
| the angle of incidence (the arriving angle) is the equal to the angle of reflection |
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Term
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Definition
| the light is evenly distributed in all directions |
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Term
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Definition
measures the perceived brightness of an object by the human eye
measured in L
influnced by contrast
glare
room spacial qualitiy
light levels in room |
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