1.

Which of the following option is correct for given statements about wavelength standard?
Statement 1: Gas lasers produce 1000 times more intense light than others.

A. nStatement 2: Lasers cannot be used for some interferometers like Pitter-NPL gauge interferometer.
B. T, F
C. F, T
D. F, F
E. T, T
Answer» E. T, T


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