Which of the following is true for Reading heads present in goniometer?
(a) There is only one reading head which is stationary
(b) Two readings heads and both are stationary
(c) There is only one reading head which is moving with a rotatable work table
(d) Two reading heads, one is stationary and other is rotating with work table
I had been asked this question during an online exam.
The origin of the question is Optical Instruments for Angular Measurement topic in chapter Angular Measurement and Circular Division of Engineering Metrology