Bab-4. Interferensi Cahaya
Bab-4. Interferensi Cahaya
Bab-4. Interferensi Cahaya
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•I min , terjadi jika kedua gelombang 180 0 out-ofphase<br />
maka cos δ = -1 :<br />
I<br />
min<br />
= I + I − I I<br />
1<br />
δ = ± π , ± 3π<br />
, ± 5<br />
2<br />
2<br />
1 2<br />
π<br />
,...<br />
<strong>Interferensi</strong><br />
destruktif<br />
•Jika kedua gelombang memiliki amplitudo yang sama,<br />
maka :<br />
I maks<br />
I<br />
I<br />
1<br />
=<br />
=<br />
I<br />
2<br />
2I<br />
0<br />
=<br />
I<br />
0<br />
( 1+<br />
cosδ<br />
)<br />
= 4I<br />
; I =<br />
0 min<br />
=<br />
0<br />
4I<br />
0<br />
cos<br />
2<br />
δ<br />
2