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Discuss the effect and calculate the displacement of the fringes when a thin trasparent plate is introduced in the path of one of the interfering beam of biprism so how this meghod is used to find the thickness of the mica sheet
Asked by Kajlapriyanka6 | 17 Jun, 2020, 01:39: PM
Expert Answer
mica sheet is introduced in the path of one wave. (such that it blocks the one half of biprism). By doing it the one wave traverse an extra optical path and the path difference between the two waves is not same and entire fringe pattern shifts. The central white fringe is now shifted to another position of cross wire. If ‘S' is the shift in position of white fringe and be the refractive index of mica sheet, thickness ‘t' of mica sheet is given by
Thickness t can be calculated using the above formula.
Answered by Utkarsh Lokhande | 17 Jun, 2020, 08:57: PM
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