2. Sample Papers
  3. JEE Main & Advanced

JEE Main & Advanced Sample Paper JEE Main Sample Paper-20

  • question_answer
    DIRECTION (Qs. 49): Each of these questions contains two statements: Statements -1 (Assertion) and Statements -2 (Reason). Choose the correct answer (ONNLY ONE option is correct) from the following.
    Statement 1: In YDSE, as shown in figure, central bright fringe is formed at O. If a liquid is filled between plane of slits and screen, the central bright fringe is shifted in upward direction.             
    Statement 2: If path difference at O increases, y-coordinate of central bright fringe will change.

    A)  Statement-1 is false, Statement-2 is true.

    B)  Statement-1 is true, Statement-2 is true; Statement-2 is a correct explanation for Statement-1

    C)  Statement-1 is true, Statement-2 is true; Statement-2 is not a correct explanation for Statement-1

    D)  Statement-1 is true, Statement-2 is false.

    Correct Answer: A

    Solution :

     Filling liquid will increase the optical path length by same amount. \[\therefore \] CBF will not shift.


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