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Problem
Problem
Bichromatic light is used in YDSE having wavelengths
λ
1
=
400
nm
\lambda_1 = 400 \text{ nm}
λ
1
=
400
nm
and
λ
2
=
700
nm
\lambda_2 = 700 \text{ nm}
λ
2
=
700
nm
. Find minimum order of bright fringe of
λ
1
\lambda_1
λ
1
which overlaps with bright fringe of
λ
2
\lambda_2
λ
2
.
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