General and Special Relativity

Einstein's Theory of Relativity proposes that gravity, time, energy and matter are all tied together. Changes in one affect the others. Each must be viewed relative to the others. Among other effects it supposes that:

1. The faster you go the slower time passes. If you put a clock on a fast rocket which eventually curves around and meets you, the clock will be running "slow" against a standard clock that you kept with you. Strangely enough an observer on the moving rocket would see his clock acting normally and the stationary clock as moving faster.

2. The faster you go, the shorter an observer standing still would see you. The reduction of length happens in the direction you are traveling. Anyone moving at the Hugh sped would see his length staying the same.

3. Energy and mass are equivalent and can be swapped one for the other at a rate shown in Einstein's famous equation (E = mc2). This can be shown to demonstrate that the faster you go the massier (heavier) you get. That is another math heavy story.

Humorists have made light of the definitions of the Theeory (e.g. Einstein once said," ... It's like when you sit next to a pretty girl for one hour, and it feels like an minute, as opposed to when you sit on a hot stove for one minute, and it feels like an hour. That is relativity.") mainly because understanding it cannot be done in anything but math-speak.

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General relativity is a theory of gravitation developed by Einstein in the years 1907-1915. The development of general relativity began with the equivalence principle, under which the states of accelerated motion and being at rest in a gravitational field (for example when standing on the surface of the Earth) are physically identical. The upshot of this is that free fall is inertial motion: In other words an object in free fall is falling because that is how objects move when there is no force being exerted on them, instead of this being due to the force of gravity as is the case in classical mechanics. This is incompatible with classical mechanics and special relativity because in those theories inertially moving objects cannot accelerate with respect to each other, but objects in free fall do so. To resolve this difficulty Einstein first proposed that spacetime is curved. In 1915, he devised the Einstein field equations which relate the curvature of spacetime with the mass, energy, and momentum within it.

Some of the consequences of general relativity are:

• Time goes more slowly at lower gravitational potentials. This is called gravitational time dilation.
• Orbits precess in a way unexpected in Newton's theory of gravity. (This has been observed in the orbit of Mercury and in binary pulsars).
• Even rays of light (which have zero mass) bend in the presence of a gravitational field.
• The Universe is expanding, and the far parts of it are moving away from us faster than the speed of light. This does not contradict the theory of special relativity, since it is space itself that is expanding.
• Frame-dragging, in which a rotating mass "drags along" the space time around it.

Technically, general relativity is a metric theory of gravitation whose defining feature is its use of the Einstein field equations. The solutions of the field equations are metric tensors which define the topology of the spacetime and how objects move inertially.

If light (as in photons) were in a vacuum, it would travel forever in a given direction.

In reality however, it is far more probable that light will experience disturbances (absorption, reflection, refraction, etc..) as it moves through space - thus, it's distance of travel is limited to some finite distance. I do not think that there is any good estimation for this realistic finite distance. Clearly, this finite distance depends on the situation of the light being transmitted, direction and regions of space through which it will travel.

add Recent observations of distant red-shifted astronomical objects indicate that their light was first emitted about the time of the Big Bang. So forever is a fair approximation. [Multiplied by the speed of light of course.]

to be fare, first you need to stop and observe a little closer. there are times I'm sure we are all guilty of being a little selfish. you need to first address any change in your own behaviour occurring that may have contributed to your partners request for space. perhaps your partner feels they just aren't getting nowhere in the relationship for some reason or another. or is going through a phase where she herself is experiencing some change. it can easily be mis read when there are strong emotions involved, and if not paid attention to, could well be the starting of your relationship to breakedown. my only advice would be,don't stop talkin,that's the only way you gonna know for sure. don't argue with what you hear if you don't like what's being said' listen and take it in,you take time to make sure you understand what is happening, it may well save your relationship. all the best. stay safe.

Scientists, by cleverly applying the "Scientific Method", invent ways to find out

stuff about things that nobody can see, by enhancing, identifying, and watching

the visible effects of those things.