In the development of Youngs double-slit experiment, a small-angle approximation (tan sin ) was used

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In the development of Young’s double-slit experiment, a small-angle approximation (tan θ ≈ sin θ) was used to find the lateral displacements of the maxima (bright) and minima (dark) positions. How good is this approximation? For example, what is the percentage error for θ = 10o?
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College Physics

ISBN: 978-0321601834

7th edition

Authors: Jerry D. Wilson, Anthony J. Buffa, Bo Lou

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