A prism of refractive index n 1 and another prism of refractive index n 2 are stuck together (as shown in the figure). n 1 and n 2 depend on λ , the wavelength of light, according to the relation n 1 = 1 . 2 + 10 . 8 × 10 - 14 λ 2 and n 2 = 1 . 45 + 1 . 8 × 10 - 14 λ 2 The wavelength for which rays incident at any angle on the interface B C pass through without bending at that interface will