I also know that if I make a slight movement the parts that reflect the light will b different, so that apparent distribution of colors on the ball will change. It is equally true that if several people are looking at the ball at the same moment, no two of them will see exactly the same distribution of colors, because no two can see it from exactly the same point of view, and any change in the point of view makes some change in the way the light is reflected. These things also hold true when evaluating the shape and size of the basketball. From a close up front view the ball looks round and has a certain circumference. If anyone else were to look at the ball from the same perspective they would agree that it is round and that it holds a certain circumference.We are all in the habit of judging as to the "real" shape of things, and we do this so unreflectingly that we come to think we actually see the real shapes. But as is seen when trying to draw objects, the object looks different in shape and size from every point of view. If the ball is "really" round, it will have a circular shape from all points of view, but it does not because from a side view it will appear 3 dimensional and more elliptical than spherical. Also if the ball is "really" a certain circumference it will have that size at all times from whatever distance but when seen from different distances the apparent size of the ball differs thus never providing an exact size or shape. All these things are not commonly noticed in looking at the basketball, because experience has taught us to construct the real shape or size from the "apparent" shape, and the "real" shape is what interests us. But the "real" shape is not what we see; it is something inferred from what we see. Which is deceiving because what we see in constantly changing and thus no truth about the basket ball itself is gotten, only about the appearance of the basketball.
