In predicting the motion of tsunamis generated in the sea, and interacting with shoreline objects. a ripple tank is used to generate straight waves in region a that travel toward region b, which is separated from region a by a straight boundary. the frequency of the generator is 2.5 hz, and the waves travel in region a with a speed of 15 cm/s. if the wave fronts in region a strike the boundary at 20, and the wave fronts in region b leave the boundary at 50, (a) use snell's law to find the relative index of refraction between the two regions (2) (b) find the wavelength in each region