*uncertainty*in wavelength? For example, for a particular quantum state the value of n dictates the wavelength of the standing wave (which is a definite value). The only thing I can think of to reconcile this is the fact that standing waves themselves are the superposition of waves of different frequencies so the uncertainty in wavelength comes from the variety of component waves making up the standing waves? And even though the wavelengths of the standing waves take on definite values, do the wavelengths of the component waves that make up the standing wave vary continuously (like the wave packet constructed from an integral) or can those only take on certain values as well? Because if that was the case then the wave packet couldn’t be localized because any finite combination of waves with discrete wavelengths will produce patterns that repeat between –Infinity and Infinity?