This is much like the sound vibrations produced by a musical instrument, e.g., the ``standing waves'' that occur on a guitar string or in an organ pipe have wavelengths that are (inverse integer) multiples of the length of the string or pipe.
(wavelengths; are; multiples of the length of the string or pipe) (the sound vibrations; produced; by a musical instrument) (the ``standing waves; occur; L:on a guitar string or in an organ pipe)
wavelengths the sound vibrations the ``standing waves
are produced occur
multiples of the length of the string or pipe
by a musical instrument
L:on a guitar string or in an organ pipe