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NEET Sample Paper NEET Sample Test Paper-66

  • question_answer
    Two parallel slits 0.6 mm apart are illuminated by light source of wavelength\[6000\,\overset{{}^\circ }{\mathop{A}}\,\]. The distance between two consecutive dark fringes on a screen 1 m away from the slits is

    A) 1 mm               

    B) 0.01 mm

    C) 0.1 m               

    D) 10 m

    Correct Answer: A

    Solution :

    Distance between two consecutive \[Dark\,\,fringes\,\,=\,\,\frac{\lambda D}{d}\,\,=\,\,\frac{6000\times {{10}^{-10}}\times 1}{0.6\times {{10}^{-3}}}\] \[=1\times 1{{0}^{-3}}\,m\,\,=\,\,1\,\,mm\]


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