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| Einstein's Special Theory of Relativity E=mc2 speed of light |
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http://www.myspace.com/acorvettes
The steps Einstein took to develop his special
theory of relativity are as follows: First,
Einstein tried to understand what must be implied
by the fact that light travels at a speed
independent of its source. From this, he realized
that time and space are not simply two unrelated
concepts; rather, they must be linked in a
space-time system whose properties appear most
dramatically when objects move very fast and are
observed by two different observers moving with
respect to one another. His final and greatest
step led him to discover and clarify
mathematically many new things about the world
that are important in each and every frame of
reference.
In each and every frame of reference, there are
relationships that hold because of the nature of
space and time. If space and time were to be
reconceived in a new interactive way, then other
things, like momentum and energy, had to be
reconceived, too. In fact, momentum and energy are
linked like space and time.
Tags : Einstein Theory of Relativity |
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Affichage : 157979
Durée : 425 s |
| Simultaneity - Albert Einstein and the Theory of Relativity |
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Imagine two observers, one seated in the center of
a speeding train car, and another standing on the
platform as the train races by. As the center of
the car passes the observer on the platform, he
sees two bolts of lightning strike the car - one
on the front, and one on the rear. The flashes of
light from each strike reach him at the same time,
so he concludes that the bolts were simultaneous,
since he knows that the light from both strikes
traveled the same distance at the same speed, the
speed of light. He also predicts that his friend
on the train will notice the front strike before
the rear strike, because from her perspective on
the platform the train is moving to meet the flash
from the front, and moving away from the flash
from the rear.
But what does the passenger see? As her friend on
the platform predicted, the passenger does notice
the flash from the front before the flash from the
rear. But her conclusion is very different. As
Einstein showed, the speed of the flashes as
measured in the reference frame of the train must
also be the speed of light. So, because each light
pulse travels the same distance from each end of
the train to the passenger, and because both
pulses must move at the same speed, he can only
conclude one thing: if he sees the front strike
first, it actually happened first.
Whose interpretation is correct - the observer on
the platform, who claims that the strikes happened
simultaneously, or the observer on the train, who
claims that the front strike happened before the
rear strike? Einstein tells us that both are
correct, within their own frame of reference. This
is a fundamental result of special relativity:
From different reference frames, there can never
be agreement on the simultaneity of events.
Tags : Science Physics Simultaneity Albert EinsteinTheory of Relativity |
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Affichage : 233399
Durée : 123 s |
| Physics 10 - Lecture 22: Relativity |
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Physics 10: Physics for Future Presidents. Spring
2006. Professor Richard A. Muller. The most
interesting and important topics in physics,
stressing conceptual understanding rather than
math, with applications to current events. Topics
covered may vary and may include energy and
conservation, radioactivity, nuclear physics, the
Theory of Relativity, lasers, explosions,
earthquakes, superconductors, and quantum physics.
[courses] [physics10] [spring2006] Credits:
lecturer:Professor Richard A. Muller,
producers:Educational Technology Services
Tags : physics 10 science education webcast uc berkeley cal course class |
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Affichage : 19469
Durée : 3355 s |
| Physics 10 - Lecture 23: Relativity II |
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Physics 10: Physics for Future Presidents. Spring
2006. Professor Richard A. Muller. The most
interesting and important topics in physics,
stressing conceptual understanding rather than
math, with applications to current events. Topics
covered may vary and may include energy and
conservation, radioactivity, nuclear physics, the
Theory of Relativity, lasers, explosions,
earthquakes, superconductors, and quantum physics.
[courses] [physics10] [spring2006] Credits:
lecturer:Richard A. Muller, producer:Educational
Technology Services
Tags : physics 10 science education webcast uc berkeley cal course class |
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Affichage : 49078
Durée : 4001 s |
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