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NEET Odisha 2019 Physics and Chemistry

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Question : 43 of 90
 
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Angular width of the central maxima in the Fraunhofer diffraction for λ=6000Å is θ0. When the same slit is illuminated by another monochromatic light, the angular width decreases by 30%. The wavelength of this light is,
[NEET OD 2019]
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