a_{2} \frac{λ}{2} = 0, 1 \times \frac{6, 33 \cdot 10^{- 7}}{2} = 3, 17 \cdot 10^{- 8} m

${a_2 \frac{\lambda}{2}=0,1 \times \frac{6,33 \cdot 10^{-7}}{2}= 3,17 \cdot 10^{-8}\, \mathrm{m}}$

Error