A surface of 2.1 mm is to be measured using a interferometer. Calculate nominal fraction for blue light which has wavelength of 0.785 μm.

A surface of 2.1 mm is to be measured using a interferometer. Calcula

1.	A surface of 2.1 mm is to be measured using a interferometer. Calculate nominal fraction for blue light which has wavelength of 0.785 μm.
A.	0.8280
B.	0.5350
C.	0.3185
D.	0.1910
Answer» D. 0.1910