Time Dilation - Albert Einstein and the Theory of Relativity



Uploaded by: MyEarbot
Video Description:
Two spaceships are traveling together through the galaxy at close to the speed of light. Mounted on one ship is a laser that can fire pulses of light, and on the other, a mirror. The pilot of the first ship fires a pulse at the mirror, and watches as it is reflected back. A clock on board measures how long the round trip takes.
But now suppose that he does this as the ships are passing an observer on a nearby asteroid. According to relativity theory, this observer sees the pulse moving through space at exactly the same speed that the pilot does -- namely, the speed of light. But he also sees the pulse traveling a longer
distance, because from his perspective, he must add the forward motion of the ships to the motion of the pulse between them. So he measures a longer time interval for the round trip than the pilot does, because he is watching the pulse go farther without going any faster. This effect is called time
dilation: if one observer is moving with respect to another, each perceives that the other's time is flowing more slowly. National Science Foundation


Share This Video:       StumbleUpon       del.icio.us       Reddit       digg       Furl       Spurl       Simpy       YahooMyWeb



Tags for this video: Albert dilation Einstein of Physics Relativity Science Theory time

Περισσότερα videos απο την κατηγορια: News
Αλλα Videos απο τον χρηστη: MyEarbot

Related Videos
Can time slow down? Time Travel: Einstein's big idea (Theory of Relativity) Relativity - The Train Paradox (Time Dilation and Length Contraction)
can-time-slow-down.htmlcan-time-slow-down.htmlcan-time-slow-down.html
Simultaneity - Albert Einstein and the Theory of Relativity General Relativity: gravitational waves Einstein's Special Theory of Relativity E=mc2 speed of light
can-time-slow-down.htmlcan-time-slow-down.htmlcan-time-slow-down.html


Comments for this video: Show || Hide
Comments for this video on YouTube
"Just because ... ( 1 month ago by Tetrahelix)
"Just because Nature is ignorant as to whom is really moving relative to whom, that doesn't mean I have to pretend similar ignorance." If nature is ignorant as to which one is "really" moving, what does it mean to say that one is "really" moving at all? Also, the entire argument of this video is based around nature's, not the astronaut's, ignorance of which object is "really" moving.
I don't believe ... ( 1 month ago by sppjfd)
I don't believe that's what the first law says. It says that if a ball is moving at a constant velocity, absent other forces, it won't stop or change that velocity unless I smack it with a bat. Or if it's just sitting there, it won't start moving until I smack it with a bat. Anything else, such as it being relative as to who is really moving and who isn't, is a reinterpretation of the law by a relativist. So if I disagree with a relativist, I'm disagreeing with the relativist, not the first law.
Nevertheless, ... ( 1 month ago by Tetrahelix)
Nevertheless, unless you can think of an experiment that would demonstrate that it is the astronauts who are moving and not the universe, your original objection to this demonstration doesn't really have merit.
The only true thing ... ( 1 month ago by JordanMedina)
The only true thing that determines what is actually moving is that the astronauts would have felt the force of acceleration on the rocket. In the twin paradox we know that the twin in the spaceship is the one moving because he felt accleration at the beginning and end of his journey not the twin left on the planet. That is what distinguishes these cases.
Even then, the ... ( 1 month ago by Tetrahelix)
Even then, the Equivalence Principal that forms the basis of Einstein's General Theory of Relativity states that an accelerating frame of reference can be converted into an "inertial" frame of reference if we postulate the presence of a significantly powerful gravitational field. But you are correct in asserting that the Twins Paradox is asymmetric due to the acceleration of the one twin.
The Father of ... ( 1 month ago by JohnnyLuuVietnam)
The Father of Science. He the father of our future.
really moving? To ... ( 1 month ago by Rubiksfanatic1)
really moving? To move yourself forwards, relative to the earth, you burn gasoline which makes the wheels turn Who's to say that the car's tires aren't actually pushing the universe along? That's what you see right? That's the point of relativity.
ONE has to be right ... ( 1 month ago by Kurtyoungblood)
ONE has to be right. Both cannot be, whatever Einstein said. Something cannot be moving and not moving at the same time in reality (Is anything ever still?). Whatever either observer says, they are NOT both right. That doesn't even make sense.
Well actually both ... ( 1 month ago by Rubiksfanatic1)
Well actually both are correct, but both perceive the other one's explanation as being incorrect. They are both correct in their own veiw.
Oh. ( 1 month ago by Kurtyoungblood)
Oh.
So time is relative ... ( 1 month ago by Kurtyoungblood)
So time is relative then... Okay. That would mean that there is no absolute view point because time is not absolute.
Is the chicken ... ( 3 weeks ago by xxxahbuixxx)
Is the chicken crossing the road? Or its actually the road is moving under the chicken?
lmao
Well, to know which ... ( 3 weeks ago by eltotoX)
Well, to know which is moving you have to take as a frame of reference distant galaxies.
The only absolute ... ( 3 weeks ago by sabdow)
The only absolute view point would be your own :D
This is actually ... ( 2 weeks ago by MikeLtheSoulChild)
This is actually the best explanation I've seen thus far!
That is also ... ( 1 week ago by stadionikis)
That is also TOTALLY wrong.....
I think all ... ( 1 week ago by greatsea)
I think all incarcerated criminals should be required to study astronomy and as one condition for parole be able to discuss time dilation.
agree ( 1 week ago by euroalbanian88)
agree
wtf no its not how ... ( 1 week ago by crazymuthaphukr)
wtf no its not how is this wrong?
Explain how you ... ( 4 days ago by SeanyFuckingG)
Explain how you KNOW that it is wrong.
I want so match to ... ( 4 days ago by stadionikis)
I want so match to walk in the wall, but i can NOT because of the lows of physics! The gravity does not let me do it...
If You know the lows of physics then You know why this experiment is wrong! We people want so match to travel through time before we understood the TIME and SPEED of light!!!
1. i do not know ... ( 2 days ago by will0ughby)
1. i do not know the "lows" of physics.2. you are closed minded
rofl talk about ... ( 2 days ago by princesslovely800)
rofl talk about useless :)
stadionkis, I do ... ( 1 day ago by Tetrahelix)
stadionkis, I do know the laws of physics, namely dt'=dt/Sqrt[1-(v^2)/(c^2)]. In short, this video is correct. Travel backwards in time is impossible, but that does not negate the fact that time is a relative concept and that relative motion between two objects affects the way they observe time passing for each other.




URL 
Embed Code 

 

Welcome to Greek videos. Search and download Youtube videos from all over Greece in the blink of an eye! Find videos for all major cities and of all the Greek islands. Planning to Travel in Greece? then you are in the right place! Here you can watch thousands of Greek Videos. You can also find information about Business in Greece, or book your accommodation if you plan to Travel Greece. View selected videos from all around Greece: Athens, Thessaloniki, Ancient Olympia, Parthenon, Acropolis, island of Santorini, Mykonos, Syros, Corfu, Paros, Crete, Halkidiki, Rhodes, Milos, Hotels in Greece and more Greek Islands, real estate in Greece.

The two major cities of Greece, Athens and Thessaloniki are waiting to be explored. Watch Sports clips and music events. Re-live the Olympic Games, all spots, clips and trailers from the major athletic event of the entire globe. Are you fond of history? Visit the Acropolis and the Parthenon category, watch videos and trailers of the ancient monuments, and find more about the myths and legends of ancient Greece.

For those who search for a new holiday destination we have Greece holidays and Greece summer. Download destination videos, in less time than it would actually take. For the sea-lovers exist: the Aegean Sea, Cyclades, Greece islands categories. Do you Know Mykonos island? Paradise Beach and Super Paradise beach? Watch Youtube Videos of the crazy and absolutely thrilling beach parties.

Santorini was said to be the lost continent of Atlantis, still it is considered one of Greece's most beautiful islands. Paros, the island of the winds! Many videos of kite and wind surfers from the Punda beach bar and Aegean Sea Battles. Crete videos and trailers, find the Minoan labyrinth and the famous Samaria Gorge. Thousands of Greek Videos are here for you to enjoy. If you want to learn the Greek Language you can also watch Greek movies with Greek Subtitles.