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In young’s double slit experiment, when ...

In young’s double slit experiment, when the slit plane is illuminated with light of wavelength` lambda_(1)`, it was observed that point P is closest point from central maximum O, where intensity was 75% the intensity at O. When the light of wavelength `lambda_(2)` is used, point P happens to be the nearest point from O where intensity is 50% of that at O. Find the ratio`(lambda_(1))/(lambda_(2))`.

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