🤓 Based on our data, we think this question is relevant for Professor Zhabinskaya's class at UCD.

Two antennas *A* and *B* radiate electromagnetic waves that are in phase and have frequency *f*. Antenna A is 8.00 m to the left of antenna *B* and point *P* is 5.00 m to the right of antenna *B*. What is the smallest value of the frequency *f* for which the waves from the two antennas have destructive interference at point *P*?