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

A double-slit interference pattern is created by two narrow slits spaced 0.21mm apart. The distance between the first and the fifth minimum on a screen 60cm behind the slits is 6.2mm. What is the wavelength of the light used in this experiment?

2. Relevant equations

gamma = d/L * Delta y

3. The attempt at a solution

delta y = 6.2mm/5 = 1.24*10 ^-3m

gamma = d/L delta y

= (2.1*10^-4m)/0.6m * 1.24*10^-3

= 434nm

but this is incorrect. Where did I go wrong?

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# Homework Help: Double-slit Interference

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