We will assume that the wave is moving in free space, thus, the velocity of the wave would be equal to the speed of light = 3 * 10^8 meters/sec
The velocity of the wave can be calculated using the following rule: velocity = frequency * wavelength where: velocity = 3 * 10^8 m/sec frequency = 2500 Hz wavelength is the unknown that we want to calculate.
Substitute with the givens in the above equation to get the wavelength as follows: 3 * 10^8 = 2500*wavelength wavelength = 120 * 10^3 meters
