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In a modified YDSE, monochromatic unifor...

In a modified YDSE, monochromatic uniform and parallel beam of light of wavelength `6000 A^(@)` and intensity `((10)/(pi)) W//m^(2)` is incident normally on two circular apertures A and B of radii 1 mm and 2 mm respectively. Find the ratio of the intensity of the sources `[(I_(B))/(I_(A))]` ?

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