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Introductory Physics Homework Help
Wavelengths: Length between 2nd-order fringes
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[QUOTE="kuruman, post: 6011820, member: 192687"] Not really, what happened to the ##n## in the expression? You need two expressions, one for each wavelength. It helps being organized. 1. For wavelength 1 you have ##x_1=nL\lambda_1/d##. 2. Write a similar expression for ##x_2##. 3. Find an algebraic expression for the difference ##x_2-x_1## for the second order fringes. 4. Put in the numbers. [B]On edit:[/B] My earlier statement that it doesn't matter if you use dark or bright fringes is incorrect. It [B]does[/B] make a difference if the wavelengths are different. I edited that statement. [/QUOTE]
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Wavelengths: Length between 2nd-order fringes
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