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NEET Sample Paper NEET Sample Test Paper-8

  • question_answer
    In Young's double slit experiment when sodium light of wavelength \[5893\overset{o}{\mathop{A}}\,\] is used, then 62 frings are seen in the field of view. Instead of sodium light if violet light of wavelength \[4358\overset{o}{\mathop{A}}\,\] is used then the number of frings that will be seen in the field of view will be:

    A)  54                  

    B)  64

    C)  74                  

    D)  84

    Correct Answer: D

    Solution :

    As,      \[{{n}_{1}}\frac{D{{n}_{1}}}{d}={{n}_{2}}\frac{D{{n}_{2}}}{d}\] \[{{n}_{1}}{{n}_{1}}={{n}_{2}}{{n}_{2}}\] \[{{n}_{2}}=\frac{{{n}_{1}}{{n}_{1}}}{{{n}_{2}}}\approx 84\] (Here, \[{{n}_{1}}{{n}_{1}}\] and \[{{n}_{2}}{{n}_{2}}\] are known).


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