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A double-slit experiment, arrangement produces interference fringes for sodium light `(lambda = 589 nm)` that have an angular separation of `3.50 xx 0^(-3)` rad . For what wavelength would the angular separation to `10%` greater?

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A double slit arrangement produces interference fringes for sodium light (lambda=589nm) that have an angular separation of 3.50xx10^-3 radian. For what wavelength would the angular separation be 10% greater?

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PHYSICS GALAXY - ASHISH ARORA-WAVE OPTICS-Unsolved Numerical Problems
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