Wave Calculations Wave Speed ● Is measured by finding the distance of one wavelength and dividing it by the amount of time it takes to travel one period ● The speed is usually calculated by multiplying the wavelength times frequency Wave Equation V = speed of wave (m/s) f = frequency of wave (Hz) ƛ= wavelength (m) Example 1 What is the velocity of a wave with a frequency of 760 Hz and a wavelength of 0.45 m? Example 1 Solution What is the velocity of a wave with a frequency of 760 Hz and a wavelength of 0.45 m? V = (760 Hz) x (0.45 m) V = 342 m/s Example 2 What is the wavelength of a sound wave moving at 340 m/s with a frequency of 256 Hz? Example 2 Solution What is the wavelength of a sound wave moving at 340 m/s with a frequency of 256 Hz? 340 m/s = 256 Hz x ƛ (Divide both sides by 256 Hz) 1.3 m = ƛ Example 3 The speed of a wave is 65 m/s. If the wavelength is 0.8 meters, what is the frequency of the wave? Example 3 Solution The speed of a wave is 65 m/s. If the wavelength is 0.8 meters, what is the frequency of the wave? 65 m/s = f x 0.8 m (Divide both sides by 0.8 m) 81.25 Hz = f