Double slit experiment wavelength of light used

  • Thread starter Iskak
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Homework Statement:
Slit spacing is 0.4mm(a); fridge separation is 1.1mm(b); slit-screen distance is 0.8m(D).
Wavelength of light used is?
Relevant Equations:
λ = (a*b)/D
0.8m -> 800mm
λ = (0.4mm*1.1mm)/800mm
= 0,00055mm
is it right?

I am past that 3 months ago, forgot how to solve.
 

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