All things trend toward disorder. More specifically, the second law of thermodynamics states that “as one goes forward in time, the net entropy (degree of disorder) of any isolated or closed system will always increase (or at least stay the same).
Entropy is simply a measure of disorder and affects all aspects of our daily lives. In fact, you can think of it as nature’s tax.
Left unchecked disorder increases over time. Energy disperses, and systems dissolve into chaos. The more disordered something is, the more entropic we consider it. In short, we can define entropy as a measure of the disorder of the universe, on both a macro and a microscopic level. The Greek root of the word translates to “a turning towards transformation” — with that transformation being chaos.
There is no place in the universe where randomness exists but there is a place for disorder as the law of entropy suggests. Entropy, therefore, measures the disorder that can be perceived as randomness.
I have, by this time, come to a conclusion that visual randomness is a sign of perception.
The act of perceiving is a time locked event, we can not perceive the past but only perceive what is there at the current time. We also cannot perceive the future, we can make guesses but we can't see the future.
Entropy is one of the few concepts that provide evidence for the existence of time.
The “Arrow of Time” is a name given to the idea that time is asymmetrical and flows in only one direction: forward. It is the non-reversible process wherein entropy increases.
In his play Arcadia, Tom Stoppard uses a novel metaphor for the non-reversible nature of entropy:
When you stir your rice pudding, Septimus, the spoonful of jam spreads itself round making red trails like the picture of a meteor in my astronomical atlas. But if you stir backwards, the jam will not come together again. Indeed, the pudding does not notice and continues to turn pink just as before. Do you think this is odd?