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AIEEE 2009 Solved Paper
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© examsnet.com
Question : 51
Total: 89
In an optics experiment, with the position of the object fixed, a student varies the position of a convex lens and for each position, the screen is adjusted to get a clear image of the object. A graph between the object distance
u
and the image distance
v
, from the lens, is plotted using the same scale for the two axes. A straight line passing through the origin and making an angle of
45
∘
with the
x
-axis meets the experimental curve at
P
. The coordinates of
P
will be :
(
f
2
,
f
2
)
(
f
,
f
)
(
4
f
,
4
f
)
(
2
f
,
2
f
)
Validate
Solution:
Here
u
=
−
2
f
,
v
=
2
f
As
|
u
|
increases,
v
decreases for
|
u
|
>
f
. The graph between
|
v
|
and
|
u
|
is shown in the figure. A straight line passing through the origin and making an angle of
45
∘
with the
x
axis meets the experimental curve at
P
(
2
f
,
2
f
)
.
© examsnet.com
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