How did a spinning octagonal mirror help Michelson calculate the time that light took to make the round trip to the distant mountain?
The way in which a spinning octagonal mirror help Michelson to calculate the time taken by the light to make the round trip to the distant mountain.
Explanation of Solution
Introduction:
In the Michelson’s experiment, a light source passes through a semi-transparent glass plate and then reflected through a rotating mirror. After that, this reflected light is focused on a concave mirror that returns the light to the rotating mirror and image is formed through a small angle difference.
Firstly, the spherical flat mirror was used in the experiment but Michelson introduced an eight-sided spherical octagonal mirror because this octagonal mirror would need to turn
Conclusion:
Hence, with the help of spinning octagonal mirror, more accurate vale of time taken by the light to make round trip to the distance mountain was obtained.
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