Maurice Tutor

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Category > Management Posted 21 Mar 2018 My Price 6.00

radiation thermometer

12.45   A radiation thermometer is a device that responds to a radiant flux within a prescribed spectral interval and is calibrated to indicate the temperature of a blackbody that produces the same flux.

(a)    When viewing a surface at an elevated tempera- ture Ts and emissivity less than unity, the ther- mometer will indicate an apparent temperature referred to as the brightness or spectral radiance

 

(a)    Defining the uncertainty of the temperature determination as dT/T, obtain an expression relat- ing this uncertainty to that associated with the intensity measurement, dIA/IA. For a 10% uncer- tainty in the intensity measurement at A = 10 µ,m, what  is  the  uncertainty  in  the  temperature  for T = 500 K? For T = 1000 K?

(b)   Defining the uncertainty of the emissivity determi- nation as dsA/sA, obtain an expression relating this uncertainty to that associated with the intensity measurement, dIA/IA. For a 10% uncertainty in the intensity measurement, what is the uncertainty in the emissivity?

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Maurice Tutor
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Status NEW Posted 21 Mar 2018 05:03 AM My Price 6.00

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