(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Monochromatic light with wavelength 580nm passes through a single slit 2.60um wide and 2.10m from a screen.

Find the distance between the first- and second-order dark fringes on the screen.

2. Relevant equations

y=(n*lamda*L)/d

3. The attempt at a solution

y1=580nm*2.1m/2.1um=0.468m

y2=580nm*2.1m*2/2.1um=0.937m

y2-y1=0.468m

I am not sure how to handle the dark fringes in single slit diffraction, so I am not sure where I am going wrong.

Thanks for people's help in advance.

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# Homework Help: Single slit diffraction - distance between 1st&2nd order dark fringes

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