a polishing apparatus is employed to polish an object to be polished by urging the surface of the object to be polished against the surface of a polishing cloth and causing a relative movement therebetween , while supplying a polishing liquid into an area between the object to be polished and the polishing cloth . a plurality of nozzles spray respective fluid jets to strike against the surface of the cloth . the plurality of nozzles include more than one type of nozzle which vary flow velocity , flow rate , angle of spray , and cross - sectional configuration of a jet . the plurality of nozzles have axes positioned at a location at different distances from the rotation axis of the polishing cloth .