A parallel beam of monochromatic light is used in Young's double-slit experiment. The slits are separated by a distance d, and the screen is placed parallel to the plane of the slits. If the incident beam makes an angle θ=sin−1(2dλ) with the normal to the plane of the slits, there will be _____ at the centre P0 of the pattern.
(a) 41 the maximum intensity
(b) Half the maximum intensity
(c) Bright
(d) Dark