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Wave Optics question

2020 · 3 Sep · Shift 2 · Q47
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Wave Optics question

2020 · 3 Sep · Shift 2 · Q47

JEE MainPhysicsWave OpticsMCQ+4 / −1
Two light waves having the same wavelength λ\lambdaλ in vacuum are in phase initially. Then the first wave travels a path L1 through a medium of refractive index n1 while the second wave travels a path of length L2 through a medium of refractive index n2 . After this the phase difference between the two waves is :
  1. A
    2πλ(n1L1−n2L2){{2\pi } \over \lambda }\left( {{n_1}{L_1} - {n_2}{L_2}} \right)λ2π​(n1​L1​−n2​L2​)
  2. B
    2πλ(n2L1−n1L2){{2\pi } \over \lambda }\left( {{n_2}{L_1} - {n_1}{L_2}} \right)λ2π​(n2​L1​−n1​L2​)
  3. C
    2πλ(L1n1−L2n2){{2\pi } \over \lambda }\left( {{{{L_1}} \over {{n_1}}} - {{{L_2}} \over {{n_2}}}} \right)λ2π​(n1​L1​​−n2​L2​​)
  4. D
    2πλ(L2n1−L1n2){{2\pi } \over \lambda }\left( {{{{L_2}} \over {{n_1}}} - {{{L_1}} \over {{n_2}}}} \right)λ2π​(n1​L2​​−n2​L1​​)
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