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*[http://rsi.aip.org/resource/1/rsinak/v60/i9/p3051_s1]
*[http://rsi.aip.org/resource/1/rsinak/v60/i9/p3051_s1 A computercontrolled turbidity apparatus]
**I_t = I_0e^{-(α+τ)l}
**I_t = I_0e^{-(α+τ)l}
**We're looking for τ.
**We're looking for τ.

Revision as of 16:59, 4 June 2013

  • A computercontrolled turbidity apparatus
    • I_t = I_0e^{-(α+τ)l}
    • We're looking for τ.
    • Aparatus for measuring turbidity as function of temperature; includes oven to place sample in. Claims 0.001/mm accuracy and 0.5% precision.
    • They measure transmitted light and assume no absorbtion; use a laser of polarized light with beam splitter.
    • Use chopper to measure ac instead of dc, claim order of magnitude better long-term stability from it.
    • Much improvement from simultaneous reference and measurement beam.
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