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Theory of Relativity

Science independent study
by

Mr.Grinch Mastermind

on 29 October 2013

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Transcript of Theory of Relativity

The Theory of Relativity
HISTORY
PHYSICS
When I say "Theory of Relativity",
you probably think Albert Einstein
or "what the heck are talking
about?". Yes, the theory of relativity was
published by Albert Einstein, but it is
commonly used in our lives today.
The theory of relativity was devised by
Albert Einstein and consists of two parts;
Special Relativity (1905) and General
Relativity (1916).
The concept of relativity was around long before
Einstein. Einstein just officialy published it publicly in the early 20th century.
The Theory of Relativity is commonly used
in our everyday lives. One example is the GPS.
If the GPS did not use the Theory of
Relativity, the location it shows would
be miles off from where we really are.
To explain this theory, imagine this.
You are in space, with no stars, and you can't
see anything but black. How fast are you
moving, if at all?
Can't answer? Exactly. Space has
no definite speed, but things in
it can have speed in
relation
to
other things. For example, there
is a racecar going 180 mph on
Daytona Speedway. Is it really
moving 180 mph?
The answer is yes and no. No, it is not moving
exactly 180 mph in comparison to the universe
since the Earth is orbiting around the sun, the
sun is orbiting around the center of the Milky
Way, etc. But it is moving 180 mph compared to Earth, if Earth is considered the base object.
That was just the basics of it.
Now it gets complicated.
Special Relativity
Special Relativity states that the
speed of light in a vacuum is the same for all observers, and that the speed of light is the limit of speed for all motion.
Physics Background
Mass: The amount of force required to accelerate an object.
Unit: grams
variable: m
Energy: The ability of an object to do "work". Energy cannot
be created or destroyed in an
isolated
system, only changed. Example: A tennis ball that you are holding above your head has POTENTIAL energy. When you drop it, that energy changes to KINETIC energy. When it hits the ground, some of that energy changes to HEAT. The amount of energy stays the same throughout the cycle. Unit: Joule variable: E
If a clock is moving at a constant
speed in relation to an observer,
it will turn slower than one at
rest.
The length of an object appears to decrease in the direction of its movement as its velocity increases.
The energy of an object increases
as its velocity increases.
Energy can be converted
into matter and matter
be converted into energy,
hence the equation
Speed of light in a vacuum: 299,792,458 meters per second or around 671,000,000 mph. It is the same for all observers, regardless if the observers are in relative motion or not.
variable: c
Relativity:
The absence of
standards of absolute
and universal application.
Defined by Google
E=mc : Einstein's equation for
mass-energy equivalence.
E=Joules m=grams c=speed
of light in a vacuum.
2
General Relativity
General Relativity can have a constant speed, or a speed that's accelerating or slowing down. It is similar to Special Relativity, but without restrictions on whether the speed is constant.
Refers to the Theory of Relativity at a
constant speed, with no acceleration.
General Relativity also states that space can be curved by big objects with a lot of gravity. Even rays of light can curve when they pass by a large object.
Can also create "lensing" which creates multiple
images of one object through the bending of light.
It also states that if you drop a ball in a rocket accelerating at a force equal to gravity, it will fall the same way it would on Earth.
General Relativity also proposes the idea of black holes.
Full transcript