##1.54bar(54) meters##
##Hz = cycles/second##
##wavelength## is measured as ##meters/cycle##
##color(white)(XXX)##or sometimes just ##meters##
##color(white)(XXX)## with the understanding that it means ##meters per cycle##
##(340 meters/cancel(second))/(220 cycles/cancel(second))##
##color(white)(XXX)=340/220 meters/cycle##
##color(white)(XXX)=1.54bar(54) meters/cycle##