In double slit experiment, the angular width of the fringes is 0.20° for the sodium light ( λ λ = 5890 Å). In order to increase the angular width of the fringes by 10%, the necessary change in the wavelength is
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Verified by ExpertsThe correct answer is:
A
By using 
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So increase in wavelength = 6479 – 5890 = 589 Å.
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