Which among the following controls the length of Fabry-Perot interferometer so that it can act as a tunable optical filter?
A. Transducer
B. Tachometer
C. Multimeter
D. Phase-meter
Answer:A
Which among the following controls the length of Fabry-Perot interferometer so that it can act as a tunable optical filter?
A. Transducer B. Tachometer C. Multimeter D. Phase-meter