What is the relation between angle of two autocollimators (R) and ang – McqOptions

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1.	What is the relation between angle of two autocollimators (R) and angle between polygon faces (P) when polygon is calibrated? (R1, R2 are the readings.)
A.	P = R + (R1+R2)
B.	P = R + (R2-R1)
C.	P = R – (R1+R2)
D.	P = R – (R1-R2)
Answer» C. P = R – (R1+R2)

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