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Albert Einstein



NOVA Biography
Special Relativity I
SR The Paper II
Special Relativity III
Special Relativity IV
Good anima--CShip
A very good Flash
The Twin Paradox
General Relativity I
General Relativity II
Giordano Bruno

Remi Hakim

For every one billion particles of antimatter there were one billion and one particles of matter. And when the mutual annihilation was complete, one billionth remained - and that's our present universe.

Albert Einstein
Classical Newtonian Physics

     "Absolute space, in its own nature, without relation to anything external, remains always similar and immovable. Relative space is some movable dimension or measure of the absolute spaces; which our senses determine by its position to bodies .. because the parts of space cannot be seen, or distinguished from one another by our senses, there in their stead we use sensible [i.e. perceptible by the sense] measures of them ... but in philosophical disquisitions, we ought to abstract from our senses, and consider things themselves, distinct from what are only sensible measures of them."

Isaac Newton

. . . be damned.
What we are famliar with - Galillean Velocity Addition



Inertial Frames of reference are frames where Newton's First Law is true.
That is, if an object experiences no net force, the object either remains at rest or continues
in motion with constant speed in a straight line.

      What caused the downfall of Classical Physics?
                                             . . .the hunt for the elusive Aether.

Enter Michelson and Morley


Set-up, Actual Experiment

It is ironic that Michelson himself wrote in 1899, "The more important fundamental laws and facts of physical reality have all been discovered and they are now so firmly established that the possibility of their ever being supplanted in consequence of new discoveries is exceedingly remote .... Our future discoveries must be looked for in the 6th place of decimals."

What is the stuff of Space?

Modern Physics has arrived!
It's a new century. . .and scientists are putting their
collective experiences together.

Mechanical Universe
 
 
Why did it take so long?






The astronaut dude sees the light beam go straight up to the mirror, bounce off the mirror and come straight down.

The earthly girl sees the light beam go at an angle up to the mirror, bounce off the mirror at an angle and come back down.


Here's the obvious question?
Which observer sees the light beam travel a longer path?

 
Either
The speed of light has different values to different observers in relative motion.
or
The time and distance have different values for different observers in relative motion.
"Traveling through space and time isn't like dusting crops back home kid!"
The two Postulates of Albert Einstein
 

 

The Laws of Physics
are the same for all Observers


The Speed of Light is the same for all Observers

 



Problem

 Other Special Relativistic Effects
 Is there any proof for this nonsense?

 Einstein's method of adding two velocities ...




All velocities must be measured with respect to something else.
There is no such thing as an absolute velocity. Problem

The Paradox of Special Relativity
Special Relativity
Is time travel possible?
Has time run out on, Einstein?
Did Einstein cheat?
Faster than Light?
GPS, to the rescue!

PBS Nova - Elegant Universe

ELEGANT UNIVERSE