Q.

Consider the following statements.

(A) In Young's double slit experiment performed with white light, all the fringes except for the central fringe are coloured while the central fringe is white.

(B) Path difference at the position of central fringe for all the colours is zero so that each colour has a maximum intensity at this position resulting in a white fringe condition of maximum intensity for all the colours which is not satisfied for any other position.

Select the correct option.                                          

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a

Both (A) and (B) are true.                         

b

(A) is true but (B) is false.

c

(A) is false but (B) is true.

d

Both (A) and (B) are false.

answer is A.

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Detailed Solution

In YDSE, central bright fringe is white as the path difference for all colors is zero, whereas, fringe width is different for different colors at positions other than that of central fringe.

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