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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 forwards AC. shift towards BD. none of these |
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Answer» Correct Answer - A::B::C The path difference `Delta X=(mu_(A)-1)t_(A)-(mu_(B)-1)t_(B)` `rArr Delta X = mu_(A)t_(A) -t_(A)-mu_(B)t_(B)+t_(B)` `rArr Delta X = t_(B) - t_(A)` If `t_(B) = t_(A)` `rArr Delta X = 0` `rArr` no shift if `t_(B)gt t_(A) or t_(B) lt t_(A)` `DeltaX ne 0` central maxima may shift towards A or B |
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