In Young's double-slit experiment, the distance between slits and the screen is 1 m and monochromatic light of wavelength 600 nm is being used. A person standing near the slits is looking at the fringe pattern. When the separation between the slits is varied, the interference pattern disappears for a particular distance do between the slits. If the angular resolution of the eye is 
, then the value of d 0 is close to
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2 mm
When the angular fringe width in the interference pattern becomes less than the angular resolving power of the person's eye, the fringes will disappear.
The angular fringe width 
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