1. The problem statement, all variables and given/known data two vibrating sources emit waves in the same elastic medium. the first source has a frequency of 25 hz, while the frequency of the second source is 75hz. waves from the first source have a wavelength of 6.9 m. they reflect from a barrier back into the original medium, with an angle of relfection of 25 degrees. waves from the second source refreact into a different medium with an angle of incidence of 35 degrees. the speed of the refracted waves is observed to be 96 m/s. 2. Relevant equations wat is the is the speed of the reflected waves from the first source in the orignal medium? 3. The attempt at a solution you cannot tell since it has most likely changed speed after refraction? Im doing a correspondance course and learning out of a book is retarded. Can someone explain this to me please?