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Angular Position of Fringes in Diffraction

75. Two light...

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75. Two light rays having the same wavelength lambda in vacuum are in phase initially. Then the first ray travels a path L1 throgh a medium of refractive index n1 while the second ray travels a path of length L2 through a medium of refractive index n2. The two waves are then combined to produce interference. The phase difference between the two waves is?

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Q. Two light rays having the same wavelength

λ

in vacuum are in phase initially. Then the first ray travels a path

L_{1}

through a medium of refractive index

n_{1}

while the second ray travels a path of length

L_{2}

through a medium of refractive index

n_{2}

. The two waves are then combined to produce interference. The phase difference between the two waves is:

Q. Two light rays having the same wavelength in vacuum are in phase initially. Then, the first ray travels a path

L_{1}

through a medium of refractive index

μ_{1}

while the second ray travels a path

L_{2}

through a medium of refractive index

μ_{2}

. The two waves are then combined to observe interference. The Phase difference between the two waves is

Q. Two light waves having the same wavelength

(λ)

in vacuum are in phase initially. Then, the first ray travels path length

L_{1}

through a medium of refractive index

μ_{1}

. The second ray travels a path of length

L_{2}

through a medium of refractive index

μ_{2}

. The two waves are then combined to observe interference effects. The phase difference between the two, when they interfere-

Q. Two light waves having the same wavelength

λ

in vacuum are in phase initially. Then the first wave travels a path

L_{1}

through a medium of refractive index

n_{1}

while the second wave travels a path of length

L_{2}

through a medium of refractive index

n_{2}

. After this, the phase difference between the two waves is:

Q. Two waves of light in air have the same wavelength and are initially in phase. They then travel through plastic layer with thicknesses of

L_{1} = 3.5 m m

L_{2} = 5.0 m m

and indices of refraction

n_{1} = 1.7

n_{2} = 1.25

as shown in figure. The rays later arrive at a common point. The longest wavelength of light for which constructive interference occurs at the point is

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