Waves Lab

Waves on a String 1. Set the frequency to 1 Hz and increase slowly until the fundamental frequency is determined. Record the frequency and the wavelength below, and take a picture. Repeat this step for the rst 3 overtones as well. What pattern do you notice for the resonant frequencies? What relationship exists between frequency and wavelength? Using the general wave equation and your data, calculate the velocity ofthe waves in the string for each resonant frequency. What pattern do you notice about the wave velocity at each resonant frequency? Explain this pattern. Sound Waves 1. Which tuning fork seems to be misadvertised or broken (i.e. its frequency listed does not match the frequency of the sound it produces)? Determine the % error. Some tuning forks, depending on how you hit them, seem to initially produce sound with peak frequencies much larger than advertised, but then over time go to their listed frequencies. Explain why this happens. (Hint: Why are there so many lines in the spectrogram?) 3. Determine the ratio of these two frequencies from Step 2 for any tuning fork. Is your answer a whole number? Is this different for waves on a string? Think ofa reason why