B. To study changes over time
Answer:
Well, because it'll be very difficult to tell apart one object from another when one perceives there is an overlap between the two.
Explanation:
Let's remeber what Helmholtz said about perception, that it some times results from the assumptions we make about the enviroment without even being truely aware of it.
In this case, the umpire will have a really hard time judging wether it was "foul ball" or a "home run", given that his emotional status may pull him toward one call or the other.
Thankfuly, there are video-recording repetitions in baseball now.
<span>Sir Isaac Newton (1642 –1727) was an
English physicist and mathematician (described in his own day as a
"natural philosopher") who is widely recognized as one of the most
influential scientists of all time and as a key figure in the scientific
revolution.</span>
ruler to subject, father to son, husband to wife, elder brother to younger brother, friend to friend
hope this helps :)
