Question

What is the principle behind which opacity monitors/transmissometers work?

a.

Change in capacitance for various gaseous media, between two stationary plates

b.

Pressure exerted by a fixed volume of gas enclosed in a container of specific dimension

c.

Scattering of light transmitted through a gas stream

d.

None of the mentioned

Answer: (c).Scattering of light transmitted through a gas stream

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Q. What is the principle behind which opacity monitors/transmissometers work?

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