A uniform plane wave (free space wave number ko = 2/o = /c) impinges on a boundary between two media at an incident angle 1 as shown below. Wave vectors are in black, wave fronts are in red. Given the refractive indices n1 and n2, the wave refracts at an angle 2. This problem considers the wavelength, wave vectors, and speeds of the waves. All answers should be symbolic for this question - expressions in terms of the freespace wavenumber ko, free-space wavelength o, angular frequency , the speed of light in free-space c, the indices of refraction n1, n2, and functions of 1 and 2. The incident and refracted waves are of the form U(r) = A exp j ~k ~r and ~r = xx + zz What is the wavelength of the incident wave (in terms of o)