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(1)• Electromagnetism E r ,t

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(1)

• Electromagnetism     E r ,t ,  Br ,t 

• Maxwell's equation        

s

a E⋅d A = Q =

P rd r ­­­ Gauss' law for electric field     

B⋅d A = 0 ­­­ Gauss' law for magnetic field

    

E⋅d l = − d B

d t ­­­ Faraday's law

    

B⋅d l = 0I = 0

J⋅d A ­­­ Ampère's law

• Continuity equation          

V

∇⋅ J = − d d t

V

d  = −

V

∂ 

t d  =>   ∇⋅J =− ∂ 

t

• N­slit interference

     I =V EB=E

 

1 21

2∣E∣2   ,   E =E1E2EiEN

      Ei= A0

xiNsin t−k xi = A0

xiNsin[t−k xik b

N i−1sin ]

(2)

      A3sin3= A1sin1A2sin 2

      E  = ab = 2Rsin A

2 , R=ab

=A0

      =

2 ,  sin 

 

2

max ,     d sin

d sin =0  =>  tan i=i

      Eixi,t = A0

N xieit −k xi

     E =

i =1 N

Eixi,t= A0

N x0ei  t− k xi

1e−i ANei N

−1

N A

1−e−i  1−e−i

N

=1−cos=2sin2 2

     

• Field energy

    electric field:  uE=E2

2  

    magnetic field:   uB= B2 2

    Energy of EM­wave : U, momentum: p     

     =>  U p =c

• Photoelectric effect

      particle      wave

     photon      EM wave

  U = Nh f        f ,,h0,B0  

    p= h         U= pc

(3)

• Quantization condition

      L=[l l1]

1 2

• Schroedinger wave equation

    i ℏ

∂tx ,t = −2 2 m

2

x2 x ,t   V xx ,t

    (1)  ∣x ,t∣2 is the probability of finding particle between  x~ xd x     

    (2)  Normalization condition:  

−∞

∞

∣ x ,t∣2d x = 1

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