I have got a bit stuck on this question so I wondered if somebody could explain it to me! I have completed part A correctly but am struggling to understand how I would calculate the refractive index for a water wave!Water waves of frequency 4.0 Hz travelling at a speed of 0.16 m/s travel across a boundary from deep to shallow water where the speed is 0.12 m/s. A) Calculate the wavelength of these wavesi) in the deep water (0.04M)i) in the shallow water (0.03M)B) The incident wavefronts cross the boundary at an angle of 25° to the boundary. Calculate the angle of the refracted wavefronts to the boundary.Thank You