In a young's double slit experiment one of the slits is covered by a thin film of thickness t =0.04 ~mm , and refractive index =1.2+ 9 10⁻¹⁴ ~m ^2 ^2 , where, is the wave length in meter. A beam of light consisting two wavelengths ₁=400 ~nm

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In a young's double slit experiment one of the slits is covered by a thin film of thickness t =0.04 ~mm , and refractive index =1.2+ 9 10⁻¹⁴ ~m ^2 ^2 , where, is the wave length in meter. A beam of light consisting two wavelengths ₁=400 ~nm and ₂=600 ~nm falls normally on the plane of the slits. Find the distance between two central maxima in milimeter. Distance of screen from slits is 400 times the separation betwee

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Correct answer: 5

aligned & x = ( S ₁ P - t )+ ₁ t - S ₂ P & 0= ( S ₁ P - S ₂ P )+ ( ₁-1 ) t & d = ( ₁-1 ) t & y₁ d D = ( ₁-1 ) t & y₂ ~d D = ( ₁-1 ) t & y ₁- y ₂= ( ₁- ₂ ) tD d & =5 ~mm aligned

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