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JEE Main & Advanced Physics Wave Optics / तरंग प्रकाशिकी Question Bank Diffraction of Light

  • question_answer
    What will be the angular width of central maxima in Fraunhoffer diffraction when light of wavelength \[6000\,{AA}\] is used and slit width is \[12\times {{10}^{-5}}cm.\] [RPMT 2004]

    A) 2 rad                                        

    B) 3 rad

    C) 1 rad                                        

    D) 8 rad

    Correct Answer: C

    Solution :

    Angular width \[=\frac{2\lambda }{d}=\frac{2\times 6000\times {{10}^{-10}}}{12\times {{10}^{-5}}\times {{10}^{-2}}}=1\,rad\text{.}\]


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