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JEEMAIN and NEET
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JEEMAIN PAST PAPERS
>>
2001
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Q)
In the visible region the dispersive powers and the mean angular deviations for crown and flint glass prisms are
ω
,
ω
′
and
d
,
d
′
respectively. The condition of getting dispersion wih zero deviation, when the two prisms are combined is :
( A )
√
ω
d
+
√
ω
′
d
′
=
0
( B )
ω
d
+
ω
′
d
′
=
0
( C )
ω
′
d
+
ω
d
′
=
0
( D )
(
ω
d
)
2
+
(
ω
′
d
′
)
2
=
0
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