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Which of the following option is true for calibration of polygons by using auto-collimators? Statement 1: Imperfect centering has a great effect on calibration. Statement 2: This method gives a high degree of accuracy without reference to any angular standard.

Which of the following option is true for calibration of polygons by using auto-collimators? Statement 1: Imperfect centering has a great effect on calibration. Statement 2: This method gives a high degree of accuracy without reference to any angular standard. Correct Answer F, T

It is not necessary for calibration of polygons that the autocollimators be aimed at the centre of polygons as there is no effect of imperfect centering in this method of calibration or autocollimators.

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