tema11 (1)
TRANSCRIPT
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http://find/http://goback/
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http://goforward/http://find/
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http://find/
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http://find/
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http://find/
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http://find/
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f (x , t ) = Asen(kx −ω t +δ )
A
k =
π λ
m-1
ω = π T
= π f
rad /s
δ
http://find/
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v =
F
µ
F
µ m-1
http://find/
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P
P (x , t ) =
µ F ω A sen (kx −ω t )
P media =
µ F ω A
http://find/
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I media
I media = P media
π r
I
r
I
r
= I
r
http://find/
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(f r
)
(f
) (f
)
f r (x , t ) = f
(x ,t ) + f
(x , t )
f r (x ,t ) = A sen(k x +ω t +δ ) +A sen(k x +ω t + δ )
http://find/http://goback/
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f r (x , t ) = sen( , x + , t ) + sen( , x + , t )
t = , s ,
http://find/http://goback/
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http://find/http://goback/
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http://find/http://goback/
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f r (x , t ) = Asen(kx −ω t ) +Asen(kx +ω t )
f r (x ,t ) = Acos (ω t ) sen(kx )
http://find/
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http://find/
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(λ / )
L = n λ
; n = , , ...
http://goforward/http://find/http://goback/
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λ n
f n
f n = v
λ n= n
v
L
f n = n
L
F
µ
f
f f
f
f
f n = n f
http://goforward/http://find/http://goback/
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f n = n v s
L
; n = ,
,
...
http://goforward/http://find/http://goback/
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f n = ( n− ) v s
L; n = , , ...
http://find/http://goback/
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http://goo.gl/k1CEknhttp://goo.gl/zx5BM0http://find/http://goback/
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