Given:
Wavelength of light, $\lambda = 425 \text{ nm} = 425 \times 10^{-9} \text{ m}$
Slit separation, $d = 132 \text{ } \mu\text{m} = 132 \times 10^{-6} \text{ m}$
Position of the 1st nodal line (dark fringe), $x_N = 1.40 \text{ cm} = 1.40 \times 10^{-2} \text{
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