A prism of refractive index n₁ and another prism of refractive index n₂ are stuck together (as shown in the figure). n₁ and n₂ depend on $\lambda$, the wavelength of light, according to the relation

${n_1} = 1.2 + {{10.8 \times {{10}^{ - 14}}} \over {{\lambda ^2}}}$ and ${n_2} = 1.45 + {{1.8 \times {{10}^{ - 14}}} \over {{\lambda ^2}}}$

The wavelength for which rays incident at any angle on the interface BC pass through without bending at that interface will be _____________ nm.