The
Holographic Principle is a scientific concept which has to do with information. It states that our entire observable universe consists essentially of information.
More precisely, this concept suggests that every piece of our reality - called "spacetime" - is encoded with informational content. And understanding this content can further our knowledge of the world and how it works.
Why use the term "holographic"? Because this principle, and its view of the universe, is just like what we know as a hologram - a reflection of light, which is simply 2 dimensional information, but which appears to us in our world as a 3 dimensional image. (Footnote 1: What is a Hologram?)
The Holographic Principle goes on to make a stunning speculation. Everything we see as 3 dimensions in our world is only informational code which is actually written somewhere else - on a 2 dimensional boundary outside of our observable world. Thus, our entire universe itself, ourselves included, may actually be a "Super-Hologram " of informational code written from a place beyond our horizon. (Footnote 2: Is Our World really a "Super-Hologram"?)
Let's get back to tennis. How does all this apply?
We now know that information is the key foundation of our reality - and it is all around us on the tennis court. Thus, "mapping" this information may be greatly beneficial or even vital to our game.
What is tennis mapping, and how does it work?
Mapping is a methodology in tennis to visually record information about your tennis opponent and his side of the court. And it arguably improves our prospects for victory.
Most players are generally concerned only with their own strokes and play. And they make only the most cursory observations of their opponents and the other side of the court. They might choose to briefly take notice of whether their opponent is right or left dominant, and whether their opponent favors the forehand or backhand side.
Mapping encourages a player to quickly make much more detailed and meaningful observations. A player doing mapping must not only look at the opponent but also the physical space on the other side of the court. And he must break down the space on the other side in terms of a visual grid of red zones and green zones: red zones are place to avoid hitting to, while green zones are places to aim for.
Let's use a simple example to illustrate this "visual grid" mapping.
Let's say we are playing a relatively tall right-handed baseline player, whose speed/fitness, net game and backhand stroke are mostly suspect. And let's just consider 3 simple factors in our grid.
When looking at our hypothetical opponent's court we see:
1. RIGHT and LEFT
*(Right means a Rightie Opponent's Backhand side.)(Left means a Rightie Opponent's Forehand side.)
2. UP and BACK
*(Up means a short shot hit to opponent.)(Back means a deep shot hit to opponent.)
3. SPEED and ENDURANCE
*(If opponent has weak speed, then running opponent from side to side is one option.)(If opponent has low endurance, then hitting longer rallies vs. short points is one option.)
What does our visual grid look like for this hypothetical opponent?
As for red zones (i.e. places to avoid hitting to), we would see a large red zone to our left or his Forehand side, especially deep. We probably also see a red zone in the middle of his court where he can easily get to on most shots.
As for green zones (i.e. places to aim for), we would see green zones to his right or Backhand side. We would also see green zones up close to the net where we would try for short and low shots, and shots to test his volleys.
We would see green zones on the far sidelines on both sides of his court due to his questionable speed and fitness (i.e. places to try and run him to). We would also see a green light when it comes to long rallies of over 5 to 8 strokes to take advantage of his doubtful endurance.
This then would be a simple example of mapping - a quick visual aid to help formulate and implement a strategy to win.
Best,
Gary
Footnotes:
1. What is a Hologram? A hologram is light which appears to us as a 3 dimensional object. It is created by first enveloping the object in a laser beam. Then, a second laser beam is shined onto the reflected light of the first, and a digital video is made of the "interference pattern." A third laser beam is then projected onto the pattern, thus producing a 3 dimensional image.
2. Is Our World Really a "Super-Hologram"? This stunning speculation was first suggested back in the 1990s by quantum physicist David Bohn (University of London) studying sub-atomic particles, and neuro-psychologist Karl Pribam (Stanford University) researching the area of memory storage in the human brain, each working independently.
More recently, research done by renowned cosmologists Stephen Hawking and Leonard Susskind, and "string" theory research done by Princeton physicist Juan Maldacena, seem to lend more support for this speculation. Meanwhile, a project known as GEO600, an experimental device in Hanover, Germany built to detect gravity waves, made an unintentional find just in 2009 which New Scientist Magazine called perhaps "the most important discovery in physics in the past half century."
It inadvertently picked up a strange constant background noise, still being investigated, which could offer tantalizing proof of our possible Holographic Universe. According to astrophysicist Craig Hogan of Fermilab, the background noise may be the fundamental limit or irreducible "grain" of spacetime which leads him to conclude that "we are all living in a giant cosmic hologram."
Sources:
1. The Holographic Universe, Michael Talbot (Harper: New York, NY, 1992)
2. The Hidden Reality, Brian Greene, Ph.D. (Knopf: New York, NY, 2011)(Chapter 9, The Holographic Multiverse)
3. "Our World May Be a Giant Hologram", Marcus Chown, New Scientist Magazine (January 15, 2009)
Video: John McEnroe Hologram!
Why is a rotating object so pleasing for us to see? 
