a. Calculate the angular width of the central maxima obtained in Fr...

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a. Calculate the angular width of the central maxima obtained in Fraunhofer's diffraction when monochromatic light of wavelength \( 550 \mathrm{~nm} \) falls normally on a rectangular slit a width \( 1.1 \times 10^{-4} \) \( \mathrm{cm} \).
b. A two slit interference experiment is performed with a monochromatic red light and a fringe width is measured. How is the fringe width affected when the source is replaced by a monochromatic blue light?
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