JEE Main & Advanced Physics Wave Optics / तरंग प्रकाशिकी Question Bank Young's Double Slit Experiment and Biprism

  • question_answer
    In Young's experiment, the distance between the slits is reduced to half and the distance between the slit and screen is doubled, then the fringe width [IIT 1981; MP PMT 1994; RPMT 1997; KCET 2000;  CPMT 2003; AMU (Engg.) 2000; DPMT 2003; UPSEAT 2000, 04; Kerala PMT 2004]

    A)            Will not change                   

    B)            Will become half

    C)            Will be doubled                  

    D)            Will become four times

    Correct Answer: D

    Solution :

               \[\beta =\frac{\lambda D}{d}\Rightarrow \] If D becomes twice and d becomes half so \[\beta \] becomes four times.


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