my_script700000000000.py

Created by loann-lefort

Created on May 24, 2022

707 Bytes

deplacement d'energie sans 
deplacement de matiere .
le son se propage que dans un
millieu materiel .

f=1/t
t=1/f

V=d/t->t=d/v->d=v.delta t 
si echo faire diviser par 2 

la celerité depend du millieu de
propagation 
dans l'air c'est environ 340m/s

infrasons<20hz<20khz< ultrasons 

longuerue d'onde =V.T 
longueure d'onde =V/f

Vus est la celerité dans millieu
de propagation 

d=Vus.x.delta t/2

surface : I=P/S


sons 

Vson=longueure d'onde/T

hauteur d'un son :
frequence d'un son 

mesure distance :
d=V.delta t / 2

intensité acoustique :
I=p/S

electromagnetique 

UV<400<longueur onde<800nm<IR

long d'onde =C.T
long d'onde =C/V 
long d'onde =C/f
f=C/long d'onde

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