What is the tolerance on thickness for Type-B (Grade I) opticals flats – McqOptions

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1.	What is the tolerance on thickness for Type-B (Grade I) opticals flats?
A.	0.05 ¬¨¬®¬¨¬µm
B.	0.15 ¬¨¬®¬¨¬µm
C.	0.20 ¬¨¬®¬¨¬µm
D.	0.30 ¬¨¬®¬¨¬µm
Answer» D. 0.30 ¬¨¬®¬¨¬µm

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