ondes.py

Created by condouarthur

Created on March 09, 2022

951 Bytes


# Type your text here
c=d/t
c=lambda/f
T=2pi/w   W=2PI*F
f=1/T
lambda=2pi/k
k=w/c

ondeP: s(x,t)=s(O,t-(x/c))
OPS : s(x,t)=Ymcos(wt-kx+Phi)
s(O)=So+SmcosPhi
s(t)=So+Smcos(wt+Phi)
<s>=Smoy=1/T intégrale(s(t)dt)

interf=^m f mLambda
O1M-O2M=pLambda
O1etO2 en phase => interf construc

sinon d2-d1=(2p+1)(Lmbda/2)

DeltaPhi=O phase
D P=pi     opp ph
D P=pi/2 quadrature de ph

ondes stationnaires harmonique

s(x,t)=Scos(wt+Phi)cos(kx+psi)

=superposi° 2ondes progr d ^m ampl ^m w(pulsa°)
vibrt sur place,pas de propaga°

d entre 2noeuds: Lambda/2
entre 1N et 1V: Lamb/4
fn=nc/2L

cosb+cosb=2cos(a+b/2)cos(a-b/2)

[N]=[F]=M.L.T^-2
[G]=M^-1.L^3.T^-2
[ro]=[M/V]=M.L^-3
[p]=M.L^2.T^-3
[E]=M.L^2.T^-2

w et k des pulsa° temp et spati

corde non libre=extrémité noeuds
mode propre=ondes stat compatibl avec condi° limites
10^6  10^9 10^12 10^5
radio m-ond  IR   UV
10^18  10^21
ray X   ray Gam

Amplitud:val max-val moy
Am càc:val max-val min

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