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12th Class Physics Wave Optics / तरंग प्रकाशिकी Question Bank MCQs - Wave Optics

  • question_answer
    In a Young's double-slit experiment the source is white light. One of the holes is covered by a red filter and another by a blue filter. In this case,

    A) there shall be alternate interference patterns of red and blue.

    B) there shall be an interference pattern for red distinct from that for blue.

    C) there shall be no interference fringes.

    D) there shall be an interference pattern for red mixing with one for blue.

    Correct Answer: C

    Solution :

    Option [c] is correct Explanation: For sustained interference, the source must be coherent and should emit the light of same frequency. In this problem, one hole is covered with red and other with blue, which has different frequency, so no interference takes place.


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