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In Young's double-slit experiment the bandwidth b is given by the expression: b = lL/D, where L is the slit-screen distance, d is the slit separation and l is the wavelength of light used: (a) Obtain an expression for the intensity distribution in the fringe system of Young's double-slit experiment. (b) Hence show that the average intensity of the fringes is equal to 2I , where I is the intensity of each beam. |
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