 | Visualization of Einstein's special relativity This video demonstrates the effects of Einstein's special relativity on objects that move at high velocities. More particularly, it visualizes the Lorentz transformation. The video shows a 3-dimensional view containing 2 dimensions of space and one dimension of time. This view is used to demonstrate the difference between classical physics and Einstein's relativity, and why the latter was necessary to understand experimental results. |
 | Two Postulates -- Special Relativity (1 of 5) Transcript: http://www.davidcolarusso.com/blog/?p=39#more-39 The Tabletop Explainer is an intermittent educational vlog presenting answers to viewer questions, brief science lessons, and ideas for teachers and students. It is a feature of my blog "Tilts at Windmils" which can be found at http://www.davidcolarusso.com/blog/ |
 | Nomenclature -- Special Relativity (2 of 5) Transcript: http://www.davidcolarusso.com/blog/?p=41#more-41 The Tabletop Explainer is an intermittent educational vlog presenting answers to viewer questions, brief science lessons, and ideas for teachers and students. It is a feature of my blog "Tilts at Windmils" which can be found at http://www.davidcolarusso.com/blog/ |
 | Lecture 8 | Modern Physics: Special Relativity (Stanford) Lecture 8 of Leonard Susskind's Modern Physics course concentrating on Special Relativity. Recorded June 9, 2008 at Stanford University. This Stanford Continuing Studies course is the first of a six-quarter sequence of classes exploring the essential theoretical foundations of modern physics. The topics covered in this course focus on classical mechanics. Leonard Susskind is the Felix Bloch Professor of Physics at Stanford University. Complete Playlist for the Course: http://www.youtube.com/view_play_list?p=CCD6C043FEC59772 Stanford Continuing Studies: http://continuingstudies.stanford.edu/ About Leonard Susskind: http://www.stanford.edu/dept/physics/people/faculty/susskind_leonard.html Stanford University Channel on YouTube: http://www.youtube.com/stanford |
 | Special Relativity: Time Dilation Fermilab Physicist, Dr. Ricardo Eusebi, explains how time dilation occurs in relation to Einstein's Theory of Special Relativity. |
 | Special Relativity (1-3) Understanding Space and Time Special Relativity E=mc2 Old, but good! |
 | Special Relativity (2-3) Understanding Space and Time Special Relativity E=mc2 Old, but good! |
 | Special Relativity (3-3) Understanding Space and Time Special Relativity E=mc2 Old, but good! |
 | Optical Effects of Special Relativity The video shows photorealistic representations of reduced c scenes. This means that the speed of light has been slowed down from over one billion kilometres per hour to a speed of only one meter per second. The consequences of this fiction have been restricted to optical effects, and allows us to see special-relativistic effects not possible in everyday life. The first scene is a trip down a highway without any relativistic effects. Note the position and orientation of the structures in the desert. For the next trip, we enable relativistic aberration. As we accelerate, note that the angular compression creates an initial impression of backwards motion. As we pass the sign, it seems to rotate around. This can be viewed as a Terrell rotation, or as angular aberration keeping the sign in our field of view as we pass it. The back walls of the building are also visible, and extreme distortion is visible on all the objects. Note particularly the sky, steadily shrinking down to the vanishing point. We now enable Doppler shifting. Note that the red desert is blue-shifted ahead through the green and red, causing a rainbow effect. As the blue of the sky is further blue-shifted, it drains of colour. Near the edges of the image, the opposite happens - the sky takes on a reddish hue and the road is drained of colour as the red desert shifts into the infra-red. With full relativistic effects (now including the headlight effect) the image quickly turns monotone, with objects near the edge of the screen darkened, and the centre brightly illuminated. The Terrell effect can be illustrated with this flyby of a cube. Note the orientation of the cube change. Also compare it's apparent position with the position indicated on the HUD map. Remember, we are seeing the cube as it was, not as it is. If we instead fly through the cube, the structures Terrell rotate independently, seeming to turn the cube inside out. Note that even when we have exited the back of the cube, aberration keeps most of it in view. Another property of aberration is that it preserves circles - that is, a sphere will always present a spherical outline to any observer regardless of their relative motion. We see this demonstrated by flying a camera around the Earth at high speed. Though the camera is very close to the surface, aberration wraps the Earth into our forward field of view. But because we are so close to the earth, we can see only a small portion of its surface - so small regions, about the size of Borneo seem to bulge out and fill the sphere. |
 | Lecture 1 | Modern Physics: Special Relativity (Stanford) Lecture 1 of Leonard Susskind's Modern Physics course concentrating on Special Relativity. Recorded April 14, 2008 at Stanford University. This Stanford Continuing Studies course is the first of a six-quarter sequence of classes exploring the essential theoretical foundations of modern physics. The topics covered in this course focus on classical mechanics. Leonard Susskind is the Felix Bloch Professor of Physics at Stanford University. Complete Playlist for the Course: http://www.youtube.com/view_play_list?p=CCD6C043FEC59772 Stanford Continuing Studies: http://continuingstudies.stanford.edu/ About Leonard Susskind: http://www.stanford.edu/dept/physics/people/faculty/susskind_leonard.html Stanford University Channel on YouTube: http://www.youtube.com/stanford |
 | Special Theory of Relativity, Albert Einstein http://www.encognitive.com The Basics of Special Relativity Relativity is a widely used term. It is generally used to describe everything from the comical version of E = mc2 to concepts about time travel. Here, we are referring to the theory called the Special Relativity which was first understood by Einstein. In Einstein's Special Theory of Relativity, he laid down two postulates: 1. The laws of physics are the same in all reference frames. This first postulate put in everyday language. 2. The speed of light through a vacuum (300,000,000 m/s or 186,000 mi/sec) is constant as observed by any observer, moving or stationary. This second postulate put in everyday language. See Experimental Evidence provided by Michelson! These postulates lead Einstein to the conclusion that if you were moving through space with a constant speed and in a constant direction, the rate at which you would travel forward in time changes. Einstein backed up his theory with sound reasoning which showed that indeed, the faster you travel through space, the slower you travel through time. Einstein's theory of relativity also predicted an effect of speed on mass observed by a stationary frame for a moving frame as well as an effect of speed on length measured in the direction of mortion by a stationary frame for a moving frame. The faster you travel through space, the more massive you become and the thinner you become in the direction of motion. When we say time slows down for you, your mass increases, and that your width changes, we mean that an observer would see these effects as that observer observes you. According to you, you are not moving and you measure your time, your mass, and your width as you always did. However, for someone not moving along with you, she would see your clock and heart beat run slow, she would see your mass seem to increase (if she pushed you, you wouldn't accelerate as much as she'd expect), and she would see your width in the direction of your motion as thinner. The consequences of special relativity offer some challenges to conceptualize, but are engaging and intriguing. The effects are often misunderstood as effects that only occur at very high speeds near the speed of light through a vacuum which is 300,000,000 m/s or 186,000,000 miles per second. In fact, all motion, even no motion is under the constraints of special relativity. The amazing thing about relativity is that it is used on a daily basis by people who make things go near the speed of light for a living. These people include high energy physicists! Try your hand at the kind of games they play everyday. Fermilab's Time Dilation Challenge. The Relativity Game - Challenge what you know! http://www.glenbrook.k12.il.us/gbssci/Phys/Class/relativity/u7l1a.html |
 | Lecture 6 | Modern Physics: Special Relativity (Stanford) Lecture 6 of Leonard Susskind's Modern Physics course concentrating on Special Relativity. Recorded May 19, 2008 at Stanford University. This Stanford Continuing Studies course is the first of a six-quarter sequence of classes exploring the essential theoretical foundations of modern physics. The topics covered in this course focus on classical mechanics. Leonard Susskind is the Felix Bloch Professor of Physics at Stanford University. Complete Playlist for the Course: http://www.youtube.com/view_play_list?p=CCD6C043FEC59772 Stanford Continuing Studies: http://continuingstudies.stanford.edu/ About Leonard Susskind: http://www.stanford.edu/dept/physics/people/faculty/susskind_leonard.html Stanford University Channel on YouTube: http://www.youtube.com/stanford |
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