Which of the Following Statements Regarding Double Beam Spectrophotometers Is

Which of the following statements regarding double beam spectrophotometers is NOT true?

A) The reference beam allows for automatic correction for source intensity fluctuations.
B) Comparison of the power emerging from the sample and reference beams determines absorbance and transmittance.
C) The reference beam allows for automatic correction for detector drift.
D) The reference beam is created using a stationary mirror.
E) The reference beam is created using a rotating mirror.

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