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Question
Physics
In Young's experiment, the ratio of maximum and minimum intensities in the fringe system is 9:1 . The ratio of amplitudes of coherent sources is
Q. In Young's experiment, the ratio of maximum and minimum intensities in the fringe system is
9
:
1
. The ratio of amplitudes of coherent sources is
3895
212
NTA Abhyas
NTA Abhyas 2020
Wave Optics
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A
9
:
1
7%
B
3
:
1
58%
C
2
:
1
32%
D
1
:
1
3%
Solution:
I
min
=
(
a
1
−
a
2
)
2
(
a
1
+
a
2
)
2
I
ma
x
1
9
=
(
a
1
−
a
2
a
1
+
a
2
)
2
a
1
−
a
2
a
1
+
a
2
=
1
3
By solving this:
a
1
+
a
2
=
3
a
1
−
3
a
2
4
a
2
=
2
a
1
a
2
a
1
=
1
2