Which of the following is not true for the method of measurement of su – McqOptions

MCQOPTIONS

1.	Which of the following is not true for the method of measurement of surface finish by micro interferometer?$
A.	Optical flat is used
B.	Monochromatic source of light is used
C.	Depth of defect can‚Äö√Ñ√∂‚àö√ë‚àö¬•t be measured
D.	Interference lines plays an important role in identification of the defect
Answer» D. Interference lines plays an important role in identification of the defect

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