A1. Coherent waves are waves that have __ A. same frequencies B. the same polarization B. identical initial phases D. constant phase difference D. equal amplitudes 1. only A 2. A. B. 3. A,B,D 4. A. B.D

The correct answer is 4. A, B, D.<br /><br />Coherent waves are waves that have the same frequency, the same polarization, and a constant phase difference. These characteristics allow the waves to interfere constructively, resulting in a stable interference pattern.