engineering recuitment GATE IN Test Series 2023-24 Mock Test Communication Systems Optical Sources and Detector
A chamber 5 cm long with flat, parallel windows at the ends is placed in one arm of a Michelson Interferometer as shown in the figure. The light used has wavelength of 500 nm in vacuum. While all air is being pumped out of the chamber, 29 fringes pass by a point on the observation screen.
The refractive index of the air is _________.
1
1.000145
2
1.000245
3
1.000345
4
1