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**1. Homework Statement**

Two narrow slits are .6 mm apart. The dark fringe of order 1 is 1.7 degrees from the central bright fringe. What is the wavelength of the light?

**2. Homework Equations**

D sinθ = (m + 1/2)λ --> chosen because it was destructive

m= order

d= distance between slit

**3. The Attempt at a Solution**

.6 (sin 1.7) = (1.5)λ

(6*10^-4)(sin1.7) /(1.5)=λ

I get , in nm ( after multiplying the answer I get 1*10^9) and I get an answer of 396666 nm. I plugged it in a few times in my calculator and I keep getting that answer. The website keeps saying it is wrong too, so I'm kinda lost

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