Shared Flashcard Set

Details

envionrn sys.
lighting
28
Architecture
Undergraduate 3
03/21/2012

Additional Architecture Flashcards

 


 

Cards

Term
angle of incidence
Definition
clear skies sun distance from earth gives daylight directionaltiy 
Term
daylight is diffuse
Definition
overcast and light rays reflect off of the dome of the sky
Term
illuminance
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

Term
daylight factor
Definition

is a percentage of a ration b/t how much light gets indoors from outside

illuminance of location inside divided by illuminance outside

Term
electromagnetic radiation
Definition

made up of oscilating quanta of enrgy

sources- both natural and man made 

- anything w/ a temp above absolute 0

 

Term
visible light
Definition

is the visible part of electormagnetic radiation made by oscilating quanta of enrgy

in between infared and ultraviolet 

Term
earths atmosphere energy balence
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

Term
refraction
Definition
light changes direction when it moves from one medium to another (like through the atmosphere)
Term
dispersion
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

Term
rayleight scattering 
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

Term
light painting
Definition
laminated glass with metalic layers the color reflected is affected by the angle of the glass to the light
Term
bio vision 3 components 
Definition

heath and happiness- connect to nature, productivity, sad

enviornment- orientation, wayfinding, visual contact

task needs- activites

Term
ability to see 3 comp. 
Definition

contrast of task to background

size and visual ability

time - slow/ fast motion

Term
illuminance guidelines for a task based on
Definition

age accuracy and context

brightness ratio

contrast

glare 

reflected glare

size of task 

duration

Term
brightness ratio
Definition
context at room scale...brightness of the tast target compared to the surounding
Term
contrast 
Definition

context to task scale 

relation b/t brightness and color of obj to its imediate suroundings

Term
glare
Definition
harsh uncomfortable bright light source of reflected interfers with visula perception
Term
reflected glare
Definition
is glare at mirror angle to viewing zone
Term
transmission
Definition

measures the amount of light passing through a material 

direct

spread

diffuse

 

Term
refraction/ refractor
Definition

device used to redirect light 

light rays change direction when passing form one medium air to another (glass/plastic)

Term
absorption
Definition

process by which light is dissipated usually by heat 

used up 

Term
reflectance
Definition

is the percentage of the light on a surface which is reradiated 

dep on angle of icidence

qualites of surface

Term
specular reflection
Definition
the angle of incidence (the arriving angle) is the equal to the angle of reflection
Term
diffuse reflection
Definition
the light is evenly distributed in all directions
Term
luminance
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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