This chapter discusses that what we see is our reality, but not the reality. The reality we see (i.e. our reality) is the reality in the past (i.e. some time ago. The past you see is a function of distance and speed. The same is true the way we are influenced by mass.

Topics described are gravity.

To explain those topics the programs 2OBJECTS, THOUGHT1, THOUGHT2, THOUGHT3 and THOUGHT4 are used.

The primary way to observe the reality is by using our eyes. With our eyes we can see and observe. When you are in a town you can see houses, buildings and people When you are outside you may be can see mountains and animals.

But is that really the way things are i.e. is that the reality the way it is now?

We all must have experienced that when there is a storm, you always first see the lightning and a little later you hear the thunder. There is a time difference between those two. The further away you are, from where the lighting strikes, the later you hear the thunder and noise, then the greater this time difference is.

This means that when you hear the thunder, that what caused it, i.e. the lightning induced by clouds, is already finished. That means noise is not a good description of the reality. Sound is an indication of something that happened in the past. This is because it takes time for sound to propagate.

Perform thought experiment 4: "A dual in the mist". THOUGHT4.TXT

The important lesson from this experiment is that the reality is not observed directly but it that there is a time period between when something happens and when you become that aware. There is a time period between when someone rings a bell and when you hear it. There is a time period between when someone shoots and when you are hit.

To say different when you hear a bell that is not the same moment when someone rings the bell or when you are hit that is not the same moment when someone shoots i.e. the reality is different based on what we hear or experience. At the same moment when you hear the bell no one rings the bell etc.

During the time period that something happened and that you become aware the situation (reality) can have changed. When you shoot in the direction that you hear the bell, the position of the person who ringed the bell can have changed. If that is the case you will (probably) miss.

The same is true light i.e. for what you see. What you see is not the reality (except the tip of your nose) but an image of the past. The further away an object is, the further away you see that object, the way it was, in the past.

Sound is propagated using air. Light is propagated by photons.

Perform thought experiment 1: "A circular train". THOUGHT1

The important parts of this experiment are that you see the train smaller as the train is (because you see the train from a distance) and after the train starts moving at the wrong position. The faster the train moves the more the train lacks behind. The real length of the train does not change.

Perform thought experiment 2: "A train on a race horse track". THOUGHT2.TXT

The important lesson from this experiment is that assuming that the real length of the train does not change that when the train moves away you see the train smaller and when the train approaches you see the train larger as solely based on distance. Again what you see is not a clear image of the reality.

Now we come to the central thesis of this books: A basic description of the reality (Laws of Nature) should be independent in the way we humans observe the reality. The human point of view should be excluded.

In chapter 2 we have seen that Newton's Law describes the movement of the stars and planets.

Newton's Law explains this movements by postulating a force. The force is called gravitation.

Gravitation is propagated by gravitons.

There is one problem with Newton's Law. Newton's law assumes that the force acts instantaneous. That means that when there is a change in the distance between m1 and m2 (or the mass m2), that the force felt by m1 now, immediate changes. That is not the case.

Gravitons have a speed. First we will assume that this speed is equal to the speed of light c. In the next chapter we will see that the speed with which gravity propagates (i.e. influences mass) can be different. Speed of gravity means that the change in force is felt by m2, when the gravitons have travelled the distance between source m1 and destination m2.

For example: Viewed from the Earth, we are now not influenced by the position of where the Sun is now, but where the Sun was some time delta t1 ago.

Delta t1 is equal to the distance between where the Sun was delta t1 ago and our current position divided by the speed of light.

For example: Viewed from the Sun, the Sun is not influenced by the position of where the Earth is now, but where the Earth was some time delta t2 ago.

Delta t2 is equal to the distance between where the Earth was delta t2 ago and the current position of the Sun divided by the speed of light.

Perform thought experiment 3: THOUGHT3.TXT

The important lesson from this experiment is that all our simulations (if propagation time of gravitation is considered) are based on the virtual position of the objects in the Universe.

Perform the programs: