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 Homework Statement:

Slit spacing is 0.4mm(a); fridge separation is 1.1mm(b); slitscreen 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.
λ = (0.4mm*1.1mm)/800mm
= 0,00055mm
is it right?
I am past that 3 months ago, forgot how to solve.