. "two-source interference" . "Double-slit experiment" . "Young's fringes" . "Young's experiment" . "Young's interference experiment" . "Young's double slit experiment" . "interference experiments" . "interference experiment" . . "Young's slits experiment" . "discovers the interference of light" . "double slit experiment" . "two-slit experiment" . . "double-slit experiment" . "Young's interference experiment" . . . .