JEE Main & Advanced Physics Wave Optics / तरंग प्रकाशिकी Question Bank Critical Thinking

  • question_answer
    A monochromatic beam of light falls on YDSE apparatus at some angle (sayq) as shown in figure. A thin sheet of glass is inserted in front of the lower slit S2. The central bright fringe (path difference = 0) will be obtained

    A)            At O

    B)            Above O

    C)            Below O

    D)            Anywhere depending on angleq, thickness of plate t and refractive index of glass m

    Correct Answer: D

    Solution :

               If \[d\sin \theta =(\mu -1)t,\] central fringe is obtained at O                    If \[d\sin \theta >(\mu -1)t,\] central fringe is obtained above O and If \[d\sin \theta <(\mu -1)t,\] central fringe is obtained below O.


You need to login to perform this action.
You will be redirected in 3 sec spinner