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Manipal Entrance Test 2018 Physics Paper
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© examsnet.com
Question : 40
Total: 50
In Young's double slit experiment, the intensity of light coming from one of the slits is double the intensity from the other slit.
The ratio of the maximum intensity to the minimum intensity in the interference fringe pattern observed is
34
40
25
38
Validate
Solution:
I
max
I
min
=
(
√
2
I
+
√
I
)
2
(
√
2
I
−
√
I
)
2
=
(
√
2
+
1
√
2
−
1
)
2
=
[
(
√
2
+
1
)
(
√
2
+
1
)
(
√
2
−
1
)
(
√
2
+
1
)
]
2
=
(
2
+
1
+
2
√
2
2
−
1
)
2
=
9
+
8
+
12
√
2
1
≈
34
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