mirrors

Discussion in 'Indoor Marijuana Growing' started by steevo, May 5, 2006.

  1. hi guys and gals just wondering on wether you can use standard mirrors as reflective material or plain white paper/paint. im looking to get reflective stuff on the cheap so if anyone has any ideas please let me know. nice one
     
  2. Mirror is reflective but not as reflective as you might think.

    Use Flat White Paint or buy Mylar.
     
  3. Reflectivity of Various Surfaces / Materials
    Source : http://www.riegl.com/distancemeters_/distancemeter_applications_/notes_/e_gi004.htm



    The amount of light that is returned from a target's surface is characterised by the reflection coefficient r.
    For a diffusely reflecting target, the maximum value of r is 100 %. For mirror-like or retroreflecting targets, the (theoretical) value of reflectivity can exceed 100 % by far. The reflection coefficient is, of course, depending on the wavelength also.



    Diffuse reflection:
    The signal is reflected omni-directionally according to Lambert's cosine law

    Mirror-like reflection:
    The angle of the reflected beam with respect to the targets surface is equal to the angle of incidence. Incident beam and reflected beam lie in the same plane.

    Retroreflection:
    The retroreflected beam is returned in the same direction from which the incident beam came. This property is maintained over a wide range of directions of the incident beam.





    --------------------------------------------------------------------------------



    Diffusely reflecting surfaces / materials: 1)
    MATERIAL
    REFLECTIVITY

    White paper up to 100%

    Dimension lumber (pine, clean, dry) 94%

    Snow 80-90%
    Beer foam 88%
    White masonry 85%
    Limestone, clay up to 75%
    Newspaper with print 69%
    Tissue paper, two ply 60%
    Deciduous trees typ. 60%
    Coniferous trees typ. 30%
    Carbonate sand (dry) 57%
    Carbonate sand (wet) 41%
    Beach sands, bare areas in dessert typ. 50%
    Rough wood pallet (clean) 25%
    Concrete, smooth 24%
    Asphalt with pebbles 17%
    Lava 8%
    Black neoprene 5%
    Black rubber tire wall 2%


    Glossy, mirror-like or retroreflecting surfaces / material: 1)
    MATERIAL
    REFLECTIVITY

    Reflecting foil 3M2000X 1250%
    Opaque white plastic 2) 110%
    Opaque black plastic 2) 17%
    Clear plastic 2) 50%

    Note:

    1) Values of reflectivity given for a wavelength of about 0.9 micrometers
    2) For materials with shiny or glossy surfaces, the reflectivity figure represents the maximum light return, with the sensor beam exactly perpendicular to the material surface.
     
  4. ^ nice find. +rep for that. wasn't aware of some of those.
     
  5. yer dude if you want to do it on the cheP GET SOME FLAT WHITE PAINTS THATS GOD OR TOTAL LIGTH PROOF WHITE PLASTIC YOU CAN GET IT FOR LIEK TWO POUND A METER IT WORKS FOR ME AND KEEPS THE LIGTH IN SO NO ONES CAN SEE SORRY I HIT CAPS AND WAS TO LAZY to delete it and retype it all out lol
     
  6. Def Go With The Flat Paint Its Easyer To Wipe Clean And Mylar Is Only More Reflective Than Flat White Paint If Its Hung Perfectly Straght And Kept Clean..

    EDIT: A MIRROR IS REFLECTIVE BUT IT ABSORBS A LOT OF LIGHT AT THE SAME TIME ITS A NO NO ON THE MIRROR IT WILL WASTE YOUR LUMANS ON THE MIRROR... AND WHITE PAINT IS CHEAP JUST GET ERR DUN SON
     
  7. nice one all just painted the little area i got going on and look forward to a nice smoke hopefully
    laterz
     

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