frequency f/Hz ∆f=±1Hz 256 384 440 480 512 Wavelength λ/ meters ∆λ=±0.012 0.700 0.888 0.908 1.024 1.548 Trial 1 0.387 0.259 0.228 0.219 0.173 Frequency Reciprocal 1/f/ 1/Hz ∆f=±0.0001 0.0019 0.0021 0.0023 0.0026 0.0039 Length h / Meters ∆h=±0.002m Trial 2 0.388 0.254 0.227 0.221 0.174 Average Length h /Meters ∆h=±0.003m Trial 3 0.385 0.256 0.225 0.225 0.177 0.387 0.256 0.227 0.222 0.175