A fiber optic gyro measures rotation using the _______ of the two beams?(a) Intensity difference(b) Resonance(c) Interference intensity(d) Wavelength differenceI have been asked this question in a job interview.I need to ask this question from Gyroscopes topic in portion Satellite Radio Navigation& Inertial Navigation of Avionics

A fiber optic gyro measures rotation using the _______ of the two beam

1.	A fiber optic gyro measures rotation using the _______ of the two beams?(a) Intensity difference(b) Resonance(c) Interference intensity(d) Wavelength differenceI have been asked this question in a job interview.I need to ask this question from Gyroscopes topic in portion Satellite Radio Navigation& Inertial Navigation of Avionics
Answer» Right choice is (C) Interference intensity To elaborate: In a fiber optic gyro, The counterpropagating BEAMS are launched into an OPTICAL path and are RECOMBINED as they EXIT. The interference generated by the recombination depends on the optical phase difference between the two beams and therefore provides a measure of rotation.

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