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  1. Mar 5, 2015 #1

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

    I hope you will help me :).
  2. jcsd
  3. Mar 5, 2015 #2


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    Staff: Mentor

    Hello litis. http://img96.imageshack.us/img96/5725/red5e5etimes5e5e45e5e25.gif [Broken]
    Last edited by a moderator: May 7, 2017
  4. Mar 6, 2015 #3

    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?
  5. Mar 6, 2015 #4
    Who can comment this and discuss with me?
  6. Mar 6, 2015 #5


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    Staff: Mentor

    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/
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