What is the thickness of the paper in this interference experiment?

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SUMMARY

The thickness of the paper in the interference experiment is calculated using the formula delta X = L (lambda / 2t). Given that the air wedge length (L) is 4 cm and the wavelength (lambda) is 639 nm, the presence of 56 bright fringes indicates that the thickness (t) can be determined by rearranging the equation. The calculation confirms the relationship between the number of fringes and the thickness of the paper, providing a definitive solution to the problem.

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  • Experience with optical experiments involving air wedges
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Homework Statement



A piece of paper is placed at the end of an air wedge 4 cm long. Interference fringes appear when the light of wavelength 639 nm is reflected from the wedge. A dark fringe occurs at both the vertex of the wedge and at its paper end, and 56 bright fringes appear between. Calculate the thickness of the paper.

Homework Equations




delta X = L (lambda / 2t)

where t is the thickness of the paper
lambda = wavelength
l = length of air wedge
X = distance between fringes.
 
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nevermind i got it I am stupid :(
 

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