InterviewSolution
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InterviewSolution
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Lights of wavelengths `lambda_(1)=4500 Å, lambda_(2)=6000 Å` are sent through a double slit arrangement simultaneously. ThenA. no interference pattern will be formedB. the thrid bright fringe of `lambda_(1)` will coincide with the fourth bright fringe of `lambda_(2)`C. the thrid bright fringe of `lambda_(2)` will coincide with the fourth bright fringe of `lambda_(1)`D. the fringes of wavelenths `lambda_(1)` will bw wider than the fringes of wavelenghts `lambda_(2)` |
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Answer» Correct Answer - C `x_(n)=(D)/(d)n_(1) lambda_(1)=(D)/(d) n_(2) lambda_(2)` `:. (n_(1))/(n_(2))=(lambda_(2))/(lambda_(1))` `:. n_(1)=(lambda_(2))/(lambda_(1)) n_(2)=(6000)/(45000)n_(2)=(4)/(3) n_(2)` `:. 3n_(1)=4n_(2)` Thus `3^(rd)` bright ringe of `lambda_(2)` will coinide with `4^(th)` bright fringe of `lambda_(1)` |
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