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JEE Advanced Model Paper 8 with solutions for online practice
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© examsnet.com
Question : 69
Total: 84
Consider three converging lenses
L
1
,
L
2
and
L
3
having identical geometrical construction.The refractive index of
L
1
and
L
2
are
µ
1
and
µ
2
respectively. The upper half of the lens
L
3
has a refractive index
µ
1
and the lower half has
µ
2
. A point O is imaged at
O
1
by thelens
L
1
and at
O
2
by the lens
L
2
placed in same position. If
L
3
is placed at same place,
There will be an image at
O
1
There will be an image at
O
2
The only image will form somewhere between
O
1
and
O
2
The only image will form away from
O
2
Validate
Solution:
Focal length of the upper part and lower part does not change
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