In Young's double-slit experiment, one of the slits is painted so that the intensity of light emitted from it is half that emitted from the other slit. Then
(1) Fringe system will disappear.
(2) Bright fringes will become brighter and dark fringes will be darker.
(3) Both bright and dark fringes will become darker.
(4) Dark fringes will become less dark and bright fringes will become less bright.