What is the best forum for asking technical physics questions?

[litis]

Hello,

I'm chemist. Sometimes I need to understand physics and this isn't so easy for me.

I hope you will help me :).

 

[NascentOxygen]

Hello litis. http://img96.imageshack.us/img96/5725/red5e5etimes5e5e45e5e25.gif

 

[litis]

Hello,

maybe you can help me? Can you say your opinion about my topic - I would be gratefull

Is it correct:
that I have mesuared the illuminance (lumen) in the room. After that in front of the lux meters' fotosensor I put polymer (about 5*5 cm, quite close) first colourless and after I tried others. From these results can I calculate T (clearness)- the polymers' light permeability? Value with polimer (lux) divided by room illuminace (lux)(where T is I permeatable light / I falling light). Would it be a correct valuation?

How works a lux meter? Does it measure what is coming directly 90 degrees from the light source? Is it a problem that I have used small sample?

 

[litis]

Who can comment this and discuss with me?

 

[NascentOxygen]

This particular forum is for Introductions. To ask technical questions you need to post on one of the technical forums. I suggest that the Introductory Physics Homework subforum would be a good choice, even though this may not be a homework exercise.

Try here: https://www.physicsforums.com/forums/introductory-physics-homework.153/