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Manipal Engineering Manipal Engineering Solved Paper-2015

  • question_answer
    In Young's double slit experiment, fringes of width \[{{m}^{3}}-3m+2n=0\] are produced on the screen kept at a distance of 1m from the slit. When the screen is moved away by \[{{m}^{3}}+3m+2n=0\]fringe width changes by \[\Delta ABC,\]The separation between the slits is \[a=4,b=3,\angle A=60{}^\circ .\] The wavelength of light used is..... .nm.

    A)  500                       

    B) 600    

    C) 700                        

    D)  400

    Correct Answer: B

    Solution :

     Since, we know that in Young's double slit experiment. \[{{T}^{2}}{{\left[ \frac{\delta (G/T)}{\delta T} \right]}_{p}}\]                                                      ?(i) \[-{{T}^{2}}{{\left[ \frac{\delta (G/T)}{\delta T} \right]}_{p}}\]                                                    ?(ii) Subtract Eq. (ii) from Eq. (i), we get \[{{T}^{2}}{{\left[ \frac{\delta (G/T)}{\delta T} \right]}_{v}}\] Substituting the given values, we get \[-{{T}^{2}}{{\left[ \frac{\delta (G/T)}{\delta T} \right]}_{v}}\] \[C{{l}_{2}}O,IC{{l}^{-}}_{2}\]\[Cl_{2}^{-},Cl{{O}_{2}}\] \[IF_{2}^{+},l_{3}^{-}\]\[ClO_{2}^{-},ClF_{2}^{+}\]\[C{{s}^{+}}\]\[L{{i}^{+}}\]


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