In YDSE, let A and B be two slits. Films of thickness `t_(A)` and `t_(B)` and refractive `mu_(A)` and `mu_(B)` are placed in front of A and B, respectively. If `mu_(A) t_(A) = mu_(A) t_(B)`, then the central maxima willA. not shiftB. shift toward AC. shift toward BD. (b) if `t_(B) lt t_(A)` and (C ) if `t_(B) lt t_(A)`

In YDSE, let A and B be two slits. Films of thickness `t_(A)` and `t_(

1.	In YDSE, let A and B be two slits. Films of thickness `t_(A)` and `t_(B)` and refractive `mu_(A)` and `mu_(B)` are placed in front of A and B, respectively. If `mu_(A) t_(A) = mu_(A) t_(B)`, then the central maxima willA. not shiftB. shift toward AC. shift toward BD. (b) if `t_(B) lt t_(A)` and (C ) if `t_(B) lt t_(A)`
Answer» Correct Answer - d `Delta x = (mu_(A) - 1) t_(A) - (mu_(B) - 1) t_(B)` `= mu_(A) t_(A) - mu_(B) t_(B) - t_(B) + t_(B)` `= t_(B) - t_(A)` If `Delta x gt 0`, the fringe pattern will shift upward. If `Delta x lt 0`, the fringe pattern will shift downward.

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