In flatness testing with interferometry, if surfaces are perfectly wru – McqOptions

MCQOPTIONS

1.	In flatness testing with interferometry, if surfaces are perfectly wrung. Then which option is correct regarding fringe pattern?
A.	No fringe pattern
B.	Fringes are closer
C.	Fringes are at great distance
D.	Indistinguishable pattern
Answer» B. Fringes are closer

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