write down two necessary conditions for interference of light Hindi
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Answer:
12th
Physics
Wave Optics
Superposition and Interference
Write any two necessary con...
PHYSICS
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Asked on December 20, 2019 by
Rahamath Mamdapur
Write any two necessary conditions for interference of light. Obtain an expression for fringe width in Young's double slit experiment. Draw curve for intensity distribution in Young's double slit experiment.
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ANSWER
1)Light should be propagate in same direction
2)Light should be coherent lights.
=ΔS
1
S
2
M
=sinθ=
d
S
2
M
=θ=
d
S
2
M
=ΔOO
1
P
=tanθ=
D
X
n
=θ=
D
X
n
=
d
S
2
M
=
D
X
n
=S
2
M=
D
X
n
⋅d
=
D
X
n
=nλ
=X
n
=
d
n
2
D
For dark fringe width (β
dark
)
=β
dark
=X
n+1
−X
n
=X
n+1
−X
n
=(n+1)
d
λD
−
d
nλD
=
d
λD
(n+1−n)
=β
dark
=
d
λD
=For bright fringe width (β
Bright
):
=
D
X
nd
=(2n+1)
2
λ
=β
Bright
=X
n+1
−X
n
=β
Bright
=(2(n+1)+1)
2d
λD
−(2n+1)
2d
λD
=
2d
λD
(2n+2+1−2n−1)
=
2d
λD
⋅2
=β
Bright
=
d
λD
Answer:
1)Light should be propagate in same direction
2)Light should be coherent lights.
=ΔS
1
S
2
M
=sinθ=
d
S
2
M
=θ=
d
S
2
M
=ΔOO
1
P
=tanθ=
D
X
n
=θ=
D
X
n
=
d
S
2
M
=
D
X
n
=S
2
M=
D
X
n
⋅d
=
D
X
n
=nλ
=X
n
=
d
n
2
D
For dark fringe width (β
dark
)
=β
dark
=X
n+1
−X
n
=X
n+1
−X
n
=(n+1)
d
λD
−
d
nλD
=
d
λD
(n+1−n)
=β
dark
=
d
λD
=For bright fringe width (β
Bright
):
=
D
X
nd
=(2n+1)
2
λ
=β
Bright
=X
n+1
−X
n
=β
Bright
=(2(n+1)+1)
2d
λD
−(2n+1)
2d
λD
=
2d
λD
(2n+2+1−2n−1)
=
2d
λD
⋅2
=β
Bright
=
d
λD
Explanation:
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