Answer :
a) The function generator must be precisely tuned to a particular frequency in this experiment because if the frequency is not set to the correct frequency, the wavelength will change.
The experiment likely involves the use of sound waves, which have a particular wavelength and frequency. The wavelength of a sound wave is inversely proportional to its frequency, meaning that if the frequency changes, the wavelength will also change. In order to ensure that the experiment is measuring the desired property of the sound waves, such as their speed or resonance, it is necessary to use a sound wave of a particular wavelength or frequency. If the frequency is not set to the correct frequency, the wavelength of the sound wave will change, which could affect the accuracy and validity of the results.
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