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Q. 27 : Two sources of light 0.5 mm apart are
placed at a distance of 1.2 m and wavelength
of light is 5000 A. The phase difference
between two lights waves interfering on the
screen at a point at a distance 3 mm from
central bright band is
(a)
5n radian
(b) 2 t radian
(c)
3 n radian
(d) 6 t radian

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