from matplotlib import pyplot
from math import *

D = 1000 #mm
LongueurOnde = D/2.5 #inférieure à L/2
T = 25 #ms
Ym = D/10

print("D = ", D, " mm ; LongeurOnde = ", LongueurOnde, " mm ; T = ", T, " ms ; Ym = ", Ym, " mm")