[color_orange]

what is the difference between illuminance and brightness? i'm suppose to write an essay about it but i don't know anything at all...please help me someone!!!!

[serre]

Hello there *waves*
illuminance and brightness?
*scratches head* yeah, i am a phys student but i'm afraid to give you wrong answers but just to give you a hand, check this out~

http://www.wikipedia.org

i go there for ALL my researches, it's a very good site for research
now, for your topic:
on illuminance: http://en.wikipedia.org/wiki/Illuminance
on brightness: http://en.wikipedia.org/wiki/Brightness

there're links at the bottom of the page to 'linked topics' so i think you'll be able to track down the stuffs you need for your essay ~ good luck in your essay ^^

[DOVAHKIIN]

Homework topics belong in the pre-college section.

Also: please remember that Wikipedia is not a reliable source for information because it is open for editing from anyone. If you're going to use wikipedia, make sure you check the reference links on the page to verify the information.