A micrometer is connected to the movable mirror of an interferometer. When the micrometer is tightened down on a thin metal foil, the net number of bright fringes that move, compared to closing the empty micrometer, is 296 What is the thickness of the foil? The wavelength of ligh used is 589 nm.

Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
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A micrometer is connected to the movable mirror of an
interferometer. When the micrometer is tightened down
on a thin metal foil, the net number of bright fringes that
move, compared to closing the empty micrometer, is 296.
What is the thickness of the foil? The wavelength of light
used is 589 nm.
Transcribed Image Text:A micrometer is connected to the movable mirror of an interferometer. When the micrometer is tightened down on a thin metal foil, the net number of bright fringes that move, compared to closing the empty micrometer, is 296. What is the thickness of the foil? The wavelength of light used is 589 nm.
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