The term 'grating' in metrology means that – McqOptions

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1.	The term 'grating' in metrology means that
A.	Rulings are more closely spaced, producing a periodic pattern without blank gaps
B.	Rulings follow a logarithmic scale
C.	Rulings need not have any pattern
D.	Rulings are spaced relatively far apart, requiring some type of interpolating device to make accurate settings
Answer» B. Rulings follow a logarithmic scale

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