Question

What is formula for the angle between autocollimator (R) when polygon is calibrated by using two autocollimators?

(a) (360^0/n)-∑(R2-R1)/n

(b) (180^0/n)-∑(R2-R1)/n

(c) (360^0/n)-∑(R2-R1)*n

(d) (180^0/n)-∑(R2-R1)*n

This question was addressed to me by my school principal while I was bunking the class.

I want to ask this question from Calibration of Polygons topic in portion Angular Measurement and Circular Division of Engineering Metrology

Answer 1

Correct option is (a) (360^0/n)-∑(R2-R1)/n

Explanation: Summation of angle between polygon faces is equal to 360 degree. If there be n number of sides in a polygon then dividing the equation throughout by n that is (360^0/n)-∑(R2-R1)/n.