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PHYSICS/RELATIVITY FAQ
Usenet Physics
FAQ
: Usenet Relativity FAQ
QUANTUM MECHANICS INDEX
COSMOLOGY/ASTRONOMY INDEX
BLACK HOLE INDEX
AVIATION FAQ's INDEX
What
is the Theory of Relativity?
A
short explanation of relativity and quantum physics?
Usenet Relativity FAQ
How
can zero velocity be achieved and what is the speed of light relative to?
General
theory of relativity and the special theory of relativity in Einstein's
original words
An English translation of Einstein's
original 1905 paper on Special Relativity
http://www.fourmilab.ch/etexts/einstein/specrel/www/
ON THE
ELECTRODYNAMICS OF MOVING BODIES By A. Einstein June 30, 1905
http://www.lrz-muenchen.de/~u7f01bf/WWW/einstein1930.intro.html
Einstein's
Unified Field Theory with Teleparallelism
Time, what is it?
Time,
what is it? If time isn't a dimension what is?
Time
a vector?
Time
Arrow
Forever
now
How
does time work?
perception:time
Does
time require change?
What does
E=mc2 actually mean? And what's relativity all
about?
E=mc2
(1) and
E=mc2
(2).
Deriving
Einstein's Mass-energy relation.
Was
Einstein the first to say E=mc2? Is there a need for an
"ether"?
Chris
attn.
What the #$%^ is
mass?
...and how does it relate to weight, inertia and so
on?
What
the #$%^ is mass?
Gravitational
and Inertial mass
Where does mass
and inertia come from?
Inertia
and Mach
Mach's
Principle
Does gravity accelerate
light?
Gravity
What is time dilation? Can you explain the twin
paradox?
Observers in relative motion have different
perceptions of the rate at which time flows. The theory of relativity
explains time dilation.
Time
dilation
Time
slowing as v->c
Twin
paradox explained
Special
theory of relativity
Deriving
the Lorentz Factor
What would happen
if you went back in time and killed your grandmother?
Nobody
is sure, but here are a few ideas:
Time
travel
Back
in time
Time
travel
Time
and space travel.
What is the speed
of gravity?
Probably the same as the speed of light.
Speed of
gravity to be measured
Speed of
gravity measured
Do things get heavier as
they go faster?
Their rest mass does not increase,
but their relativistic mass does.
Mass
and velocity.
How does matter bend
space?
How
does matter warp space?
Will it ever
be possible to travel faster than light?
Perhaps.
Speed
of light
(Dr. Karl has this to say.)
Avatar Chris has written a tutorial about this:
Tutorial:
Faster than Light.
If you travel
faster than the speed of light, do you go back in time?
You
might, but relativity has a few things to say about faster than
light travel.
Speed
of light/time.
I heard that
scientists made a light pulse travel at 300 times the normal speed of
light.
This was a real experiment, but the effect doesn't
violate any known physical laws.
Pulse
moving faster than light?
My rocket
is travelling at 0.9 times the speed of light and I throw a ball forward
at 0.2 times the speed of light. Isn't the ball travelling faster than
light?
No. Common sense ideas for adding speeds don't work
near the speed of light. We need relativity.
Faster
than the speed of light.
If the speed
of light is known, what is the speed of darkness?
speed
of darkness
What did Sir Isaac Newton
have to do with all this?
See Chris W's excellent
tutorial.
Tutorial:
Newton
Can particles communicate
faster than the speed of light?
Yes, but we can't use this
to send messages.
Faster
than light
Instantaneous
or back in time.
I've heard that some
particles travel faster than light.
These particles are
called Tachyons. So far, they are only theoretical.
Tachyons
Faster
than the speed of light.
How do they
measure the speed of light? .
How
do they measure the speed of light?
I'm travelling at the speed of light and I turn on my
headlights." - Best answers
One serious response, and a few
witty ones.
"I'm
travelling at the speed of light and I turn on my headlights." - Best
answers
Faster than light
communication by pulling on a pole?
Would it work?
FTL
communication by pulling on a pole?
How does gravity produce
acceleration?
Gravity
and Acceleration
Lagrangian Points
Special regions in the Sun-Earth-Moon system.
Lagrangian
Points
What are gravity waves? Why
are they hard to detect? What's being done?
Gravity
waves
Gravity
wave detection
What would happen if I
jumped into a hole drilled through the Earth?
You'd fall and
end up in simple harmonic motion.
Falling
through the Earth
Journey
to the centre of the Earth
Falling
into a hole.
Did the laws of physics
precede the big bang?
Paul Davies questioned.
Did
the laws of physics precede the big bang?
Does the universe "wrap around"?
Straight
lines
How can a ripple tank be used
to demonstrate the behaviour of light?
Ripple
tanks
What the #$%^ is angular
momentum?
Well, it's something to do with rotation....
What
the #$%^ is angular momentum?
Centrifugal force?
Does it exist?
Centrifugal
force
Is it possible to correct out
of focus photos with lenses?
Out
of focus photo
Has physics really
shown that a bee cannot fly?
Bee
aerodynamics
Why is perpetual motion
impossible?
Laws
of Thermodynamics
Would driving a
generator with a motor allow perpetual motion?
Perpetual
motion
Golf?
Why
does a golf ball spin backwards on the green on the second bounce, but not
the first?
If
golf balls move through the air faster Why aren't formula one cars
dimpled?
If
I hit a golf ball or fire a bullet what is the best angle to achieve
greatest distance ?
How
do golf ball dimples work?
Flight
of a golf ball
What length skis are
best if you want to go fast?
Speed
of skis
Cricket?
I
am wondering about this so called "reverse swing" that bowlers seem to get
in cricket.
Biomechanics
of soccer?
Time Travel
RONALD
MALLETT time machine????
New theory
for time travelling wormholes.
Black
Hole time machines
Types of
Force
There are four known forces in nature - gravitational,
strong nuclear, weak nuclear, electromagnetic.
Could
somebody please explain as simpley as is possible the weak and strong
forces?
How
do the forces rank in strength?
Laws
of Physics
String Theory
I've always heard of the great
advancement in physics science that human had manage to combine the above
two force in one theorem. But the question is, what is the actually
theorem?
Salam,
Weinberg and Glashow won the Nobel prize in 1979 for unifying the
electromagnetic interaction with the weak nuclear
interaction
Quantum Gravity
Heisenberg, the double slit experiment and quantum
weirdness.
Quantum
Mechanics
QM
Double Slit
more
QM Double Slit
Youngs
Double slit experiment
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