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PENGERTIAN
          a d a l a h
       p e r i s t i wa
       p e r p a d u a n
       d u a /l e b i h
   d i s u a t u t i t i k
            p a d a
 m e d i u m ,I n t e r f e r
      e n s i d a p a t
t e r j a d i j i k a d u a
  b u a h g e l o mb a n g
            y a n g
 b e r i n t e r f e r e n s
        i a d a l a h
 k o h e r e n ,a r t i n y a
        me mi l i k i
INTERFERENSI   INTERFERENSI
KONSTRUKTIF     DESTRUKTIF
INTERFERENSI
I n t e r f e r e n s i Ko n s t r u k t i f
                    KONSTRUKTIF
a da l a h i nt e r f e r e ns i y a ng
s a l i n g me n g u a t k a n d a n
t e r j a d i j i k a g e l o mb a n g y a n g
b e r i n t e r f e r e n s i me mi l i k i
f a s e y a n g s a m a .I n t e r f e r e n s i
Ko n s t r u k t i f b i s a j u g a
di s e but de nga n I nt e r f e r e ns i
M a k s i m u m ,y a i t u g e l o m b a n g
s a l i n g me mp e r k u a t d a n
me n g h a s i l k a n g a r i s t e r a n g
D u a g e l o mb a n g d i s e b u t
“s e f a s e ”.d i k a t a k a n s e f a s e
j i k a k e d u a g e l o mb a n g
t e r s e b u t me mi l i k i f r e k u e n s i
s a ma d a n p a d a s e t i a p s a a t
y a n g s a ma me mi l i k i a r a h
I n   t e r f eINTERFERENSI r u k t i f
                r e n s i De s t
a d   a l a h i DESTRUKTIF n s i y a n g
                 nt e r f e r e
s a   l i n g me n i a d a k a n d a n
t e   r j a d i j i k a g e l o mb a n g
y a   ng be r i nt e r f e r e ns i
me    mi l i k i f a s e y a n g
be    r l a wa n a n . I n t e r f e r e n s i
a d   a e s t r uk t i f di s a j uda
di    s e but de nga n
I n   t e r f e r e n s i M i n i m u ,y a i t u
ge    l o mb a n g s a l i n g
me    mp e r l e ma h d a n
me    ngha s i l k a n ga r i s ge l a p.
Du    a g e l o mb a n g d i s e b u t
be    r l a wa n a n f a s e , j i k a
k e   d u a g e l o mb a n g t e r s e b u t
me    mi l i k i f r e k u e n s i
Keterangan:
       (a) Dua Gelombang Sefase
(b) Dua gelombang berlawanan fase
J i   k   a    d u a g    e l o mb a n g     s e f a s e d a n d u a
     g e   l   o   mb a n g     b e r l a wa n    a n f a s e
     me    n   g   a l a mi     i n t e r f e r   e n s i , a k a n
     d i   d   a   p a t k a   n s e p e r t i     g a mb a r d i b a w a h
     i n   i   :




Ke t e r a n g a n :
(a ) I n t e r f e r e n s i       ma k s i mu m d u a g e l o mb a n g s e f a
(b ) I n t e r f e r e n s i       mi n i mu m d u a g e l o mb a n g b e r l a
g   e   lmb a n g s a ma .
            o
J   i   k s u mb e r n y a mo n o k r o ma t i k , ma k a
            a
p   o   l i n t e r f e r e n s i a d a l a h h i t a m-
            a
p   u   th .i
        Pol a i nt e r f e r e ns i s t a bi l , j i k a
me mi l i k i f r e k u e n s i s a ma .
Pe r be da a n f r e k ue ns i y a ng s i gni f i k a n
me n g a k i b a t k a n b e d a f a s a y a n g
b e r g a n t u n g w a k t u J i k a s u mb e r
me ma n c a r k a n c a h a y a p u t i h , ma k a
k o mp o n e n me r a h b e r i n t e r f e r e n s i
d e n g a n me r a h , b i r u d e n g a n b i r u d a n
s e t e r us ny a .
        Pol a i nt e r f e r e ns i a k a n t e r l i ha t
j e l a s , j i k a s u mb e r me mi l i k i
a mp l i t u d o y a n g h a mp i r s a ma a t a u
s a m a .D a e r a h p u s a t d a r i p o l a t e r a n g
a t a u g e l a p me n u n j u k k a n i n t e r f e r e n s i
y a ng k ons t r uk t i f a t a u de s t r uk t i f
s e mp u r n a .
        I nt e r f e r e ns i t e r j a di pa da
c a ha y a y a ng t e r pol a r i s a s i l i ni e r
a t a u p o l a r i s a s i l a i n , t e r ma s u k
c a h a y a n a t u r a l / a l a m i (H u k u m
Di e l e k t r i k )

                      CONTOH
Ef e k i nt e r f e r e ns i j uga da pa t
d i a ma t i p a d a l e mb a r a n t i p i s
ma t e r i a l d i e l e k t r i k d e n g a n
k e t e ba l a n da l a m r e nt a ng
n a n o me t e r – c e n t i me t e r . C o n t o    h :
l a p i s a n f i l m d i k a c a ma t a , k a c     a
he l m
2. I n t e r f e r e n s i p a d a L a p i s a n
S a b u n (We d g e S h a p e d F i l m )
Ke t i k a c a h a y a d i p a n t u l k a n d a     r i
bui h s a bun a t a u da r i l a y a r
t i p i s d a r i mi n y a k y a n g
me n g a mb a n g d a l a m a i r t e r l i h a      t
b e r m a c a m -m a c a m w a r n a . H a l i n i
a k i ba t pe nga r uh i nt e f e r e ns i
a n t a r a d u a g e l o mb a n g c a h a y a
y a ng di pa nt ul k a n pa da
p e r mu k a a n y a n g b e r l a w a n a n d a     r i
I n   t   e r f e r e n s i d a p a t b e r s i f a t me mb a n g u n
da    n    me r u s a k . B e r s i f a t me mb a n g u n j i k a
be    d   a k e d u a g e l o mb a n g s a ma s e h i n g g a
ge    l   o mb a n g b a r u y a n g t e r b e n t u k a d a l a h
pe    n   j u ml a h a n d a r i k e d u a g e l o mb a n g
t e   r   s e but .
Be    r   s i f a t me r u s a k j i k a b e d a f a s e n y a
a d   a   l a h 180 d e r a j a t , s e h i n g g a k e d u a
ge    l   o mb a n g s a l i n g me n g h i l a n g k a n
THANK
 YOU
NAMA KELOMPOK:
 1.DIKI ANJASMORO PUTRO
    2.DESSY PUSPITASARI
3.FRIDIAWATI EKO INDAYANI
     4. NIA DWI SUGESTI
       5.YULI RAHAYU
  6. YENNY FEBRIANA R.A.
XII_IPA 2
ANNELIDA

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Interferensi gelombang

  • 1.
  • 2. PENGERTIAN a d a l a h p e r i s t i wa p e r p a d u a n d u a /l e b i h d i s u a t u t i t i k p a d a m e d i u m ,I n t e r f e r e n s i d a p a t t e r j a d i j i k a d u a b u a h g e l o mb a n g y a n g b e r i n t e r f e r e n s i a d a l a h k o h e r e n ,a r t i n y a me mi l i k i
  • 3. INTERFERENSI INTERFERENSI KONSTRUKTIF DESTRUKTIF
  • 4. INTERFERENSI I n t e r f e r e n s i Ko n s t r u k t i f KONSTRUKTIF a da l a h i nt e r f e r e ns i y a ng s a l i n g me n g u a t k a n d a n t e r j a d i j i k a g e l o mb a n g y a n g b e r i n t e r f e r e n s i me mi l i k i f a s e y a n g s a m a .I n t e r f e r e n s i Ko n s t r u k t i f b i s a j u g a di s e but de nga n I nt e r f e r e ns i M a k s i m u m ,y a i t u g e l o m b a n g s a l i n g me mp e r k u a t d a n me n g h a s i l k a n g a r i s t e r a n g D u a g e l o mb a n g d i s e b u t “s e f a s e ”.d i k a t a k a n s e f a s e j i k a k e d u a g e l o mb a n g t e r s e b u t me mi l i k i f r e k u e n s i s a ma d a n p a d a s e t i a p s a a t y a n g s a ma me mi l i k i a r a h
  • 5. I n t e r f eINTERFERENSI r u k t i f r e n s i De s t a d a l a h i DESTRUKTIF n s i y a n g nt e r f e r e s a l i n g me n i a d a k a n d a n t e r j a d i j i k a g e l o mb a n g y a ng be r i nt e r f e r e ns i me mi l i k i f a s e y a n g be r l a wa n a n . I n t e r f e r e n s i a d a e s t r uk t i f di s a j uda di s e but de nga n I n t e r f e r e n s i M i n i m u ,y a i t u ge l o mb a n g s a l i n g me mp e r l e ma h d a n me ngha s i l k a n ga r i s ge l a p. Du a g e l o mb a n g d i s e b u t be r l a wa n a n f a s e , j i k a k e d u a g e l o mb a n g t e r s e b u t me mi l i k i f r e k u e n s i
  • 6. Keterangan: (a) Dua Gelombang Sefase (b) Dua gelombang berlawanan fase
  • 7.
  • 8. J i k a d u a g e l o mb a n g s e f a s e d a n d u a g e l o mb a n g b e r l a wa n a n f a s e me n g a l a mi i n t e r f e r e n s i , a k a n d i d a p a t k a n s e p e r t i g a mb a r d i b a w a h i n i : Ke t e r a n g a n : (a ) I n t e r f e r e n s i ma k s i mu m d u a g e l o mb a n g s e f a (b ) I n t e r f e r e n s i mi n i mu m d u a g e l o mb a n g b e r l a
  • 9.
  • 10. g e lmb a n g s a ma . o J i k s u mb e r n y a mo n o k r o ma t i k , ma k a a p o l i n t e r f e r e n s i a d a l a h h i t a m- a p u th .i Pol a i nt e r f e r e ns i s t a bi l , j i k a me mi l i k i f r e k u e n s i s a ma . Pe r be da a n f r e k ue ns i y a ng s i gni f i k a n me n g a k i b a t k a n b e d a f a s a y a n g b e r g a n t u n g w a k t u J i k a s u mb e r me ma n c a r k a n c a h a y a p u t i h , ma k a k o mp o n e n me r a h b e r i n t e r f e r e n s i d e n g a n me r a h , b i r u d e n g a n b i r u d a n s e t e r us ny a . Pol a i nt e r f e r e ns i a k a n t e r l i ha t j e l a s , j i k a s u mb e r me mi l i k i a mp l i t u d o y a n g h a mp i r s a ma a t a u s a m a .D a e r a h p u s a t d a r i p o l a t e r a n g a t a u g e l a p me n u n j u k k a n i n t e r f e r e n s i y a ng k ons t r uk t i f a t a u de s t r uk t i f s e mp u r n a . I nt e r f e r e ns i t e r j a di pa da c a ha y a y a ng t e r pol a r i s a s i l i ni e r a t a u p o l a r i s a s i l a i n , t e r ma s u k c a h a y a n a t u r a l / a l a m i (H u k u m
  • 11. Di e l e k t r i k ) CONTOH Ef e k i nt e r f e r e ns i j uga da pa t d i a ma t i p a d a l e mb a r a n t i p i s ma t e r i a l d i e l e k t r i k d e n g a n k e t e ba l a n da l a m r e nt a ng n a n o me t e r – c e n t i me t e r . C o n t o h : l a p i s a n f i l m d i k a c a ma t a , k a c a he l m 2. I n t e r f e r e n s i p a d a L a p i s a n S a b u n (We d g e S h a p e d F i l m ) Ke t i k a c a h a y a d i p a n t u l k a n d a r i bui h s a bun a t a u da r i l a y a r t i p i s d a r i mi n y a k y a n g me n g a mb a n g d a l a m a i r t e r l i h a t b e r m a c a m -m a c a m w a r n a . H a l i n i a k i ba t pe nga r uh i nt e f e r e ns i a n t a r a d u a g e l o mb a n g c a h a y a y a ng di pa nt ul k a n pa da p e r mu k a a n y a n g b e r l a w a n a n d a r i
  • 12.
  • 13. I n t e r f e r e n s i d a p a t b e r s i f a t me mb a n g u n da n me r u s a k . B e r s i f a t me mb a n g u n j i k a be d a k e d u a g e l o mb a n g s a ma s e h i n g g a ge l o mb a n g b a r u y a n g t e r b e n t u k a d a l a h pe n j u ml a h a n d a r i k e d u a g e l o mb a n g t e r s e but . Be r s i f a t me r u s a k j i k a b e d a f a s e n y a a d a l a h 180 d e r a j a t , s e h i n g g a k e d u a ge l o mb a n g s a l i n g me n g h i l a n g k a n
  • 15. NAMA KELOMPOK: 1.DIKI ANJASMORO PUTRO 2.DESSY PUSPITASARI 3.FRIDIAWATI EKO INDAYANI 4. NIA DWI SUGESTI 5.YULI RAHAYU 6. YENNY FEBRIANA R.A.