formul.py

Created by condouarthur

Created on April 17, 2023

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Energie light (en J) :
E=(h*c)/lambda ou =h*nu
lambda : longueur d'onde en nm
h : 6,63*10^-34 J/s
c: vitesse light 3*10^8

frequence
f=1/T=wo/2pi
f en Hz T en s

lambda= c*T
c : celerite : 3*10^8 m/s
lambda en m , T en s

celerite d'une onde (m/s)
c=d/deltat
distance en m, duree deltat en s

retard en s
t'=AB/c    AB en m

double periodicite (spatiale et temporelle)
lambda=c*T=c/f

onde mecanique sinusoidale : evolution temporelle de l'elogation
x(t)=Xmax*cos((2π/T)*T+O))
Xmax : elogation maximal
O (barré) : dephasage a l'origine en radian

fharmoniques=k*ffondamental

intensité sonore I0=1,à*10^-12W/m^2

niveau d'intensite en dB
L=10*log(I/I0)
(si intensite double alors L augmente de 3dB)

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