HPS 0410 Einstein for Everyone Title page, Preface and Table of Contents for Einstein for Everyone Introduction: the Questions Special Relativity Special Relativity: the Principles Special Relativity: Clocks and Rods Special Relativity: Adding Velocities Special Relativity: the Relativity of Simultaneity Is Special Relativity Paradoxical? E=mc2 Origins of Special Relativity Einstein's Pathway to Special Relativity Spacetime Spacetime Spacetime and the Relativity of Simultaneity Spacetime, Tachyons, Twins and Clocks What is a four dimensional space like? Philosophical Significance of the Special Theory of Relativity. Skeptical Morals. Morals About Theory and Evidence. Morals About Time. Non-Euclidean Geometry Euclidean Geometry: The First Great Science Euclid's Fifth Postulate Non-Euclidean Geometry: A Sample Construction Non-Euclidean Geometry and Curved Spaces Spaces of Constant Curvature Spaces of Variable Curvature General Relativity General Relativity Gravity Near a Massive Body Einstein's Pathway to General Relativity Relativistic Cosmology
Are There More Than Three Dimensions? For most of our history, we've rested easy in the notion that there were three dimensions that have existed throughout time: length, width and height. Ah, the good old days. In the early 20th century, Hermann Minkowski and Albert Einstein connected our comfortable three dimensions with a fourth, time, defining special relativity using a space-time continuum. This kind of worked, but still didn't explain a troublesome new theory of gravity called quantum mechanics that arose around the same time Minkowski and Einstein were working on their theories. While higher theoretical dimensions began with Descartes in the 1600s, in the 1970s string theory expanded on this idea as physicists attempted to tie everything together in one elegant explanation of the universe. Watch the full documentary now -
Invisible Worlds Richard Hammond's Invisible Worlds is a BBC television documentary programme presented by Richard Hammond that features state-of-the-art camera technology used to focus on what humans cannot see with the naked eye. It is one series long consisting of three episodes. 1. Speed Limits - Richard Hammond explores the extraordinary wonders of the world of detail hidden in the blink of an eye. The human eye takes about fifty milliseconds to blink. But it takes our brain around a hundred and fifty milliseconds to process what we see. What new marvels would we see? 2. From death-defying aerial repairmen in the United States using ultraviolet cameras to seek out an invisible force that lurks unseen on power lines, to German scientists unlocking the secrets of animal locomotion with the world's most powerful moving x-ray camera, to infrared cameras that can finally reveal the secrets within a humble beehive, he shows how new technologies are letting us see our world anew. 3.
10 Amazing Augmented Reality iPhone Apps While Lawnmower Man may have led us to believe the future was a virtual one, it seems that in fact augmented reality (the overlaying of digital data on the real world) is where we're headed. A buzz technology right now, augmented reality apps are quickly gaining momentum on the iPhone. So to add to the quick overview of six AR apps we brought you earlier, we sort the digital wheat from the pixellated chaff to bring you ten AR apps for the iPhone that vary from functional, to educational, to just plain fun. 1. Although the wisdom of getting drunk people to wave their iPhones around on today's mean streets is questionable, if you drink responsibly, as this Stella Artois-backed app urges you to, this could be a handy tool. 2. Another corporate-backed app, this time by Plantronics, is WorkSnug, an iPhone app that finds digital nomads a place to lay their weary laptop. 3. This star map app will spell out the stars, planets and constellations for you. 4. 5. 6. 7. 8. 9. 10. iPew
10 Strange Things About The Universe Space The universe can be a very strange place. While groundbreaking ideas such as quantum theory, relativity and even the Earth going around the Sun might be commonly accepted now, science still continues to show that the universe contains things you might find it difficult to believe, and even more difficult to get your head around. Theoretically, the lowest temperature that can be achieved is absolute zero, exactly ? One of the properties of a negative-energy vacuum is that light actually travels faster in it than it does in a normal vacuum, something that may one day allow people to travel faster than the speed of light in a kind of negative-energy vacuum bubble. One prediction of Einstein’s theory of general relativity is that when a large object moves, it drags the space-time around it, causing nearby objects to be pulled along as well. Relativity of Simultaneity Since this extra dimension is so small, only tiny objects, such as particles, can move along it. Antimatter Retrocausality
Articles on "Electricity" Why three prongs?Why do wall outlets have three holes? "Grounding" and safety. Right Angle CircuitryDo Lenz' Law and the Right Hand rule still work... after you've been turned INSIDE OUT by that greasy black Fog? "Static Electric" misconceptionsA list of things which gave me a warped view of Electrostatics. Speed of "Electricity"? Triboelectric Series If a cat gets trapped in a clothes dryer full of nylon pantyhose, which way do the electrons flow? Where does EM energy flow in a circuit? How Scientists Define the word "Electricity" Quotes from J.C. Barriers to Understanding ElectricityTwenty misconceptions which prevented me from understanding simple electrical science as a student. "Static" Electricity is really just high voltage.Scuff on the rug, then measure your body voltage. Electricity mistakes and 'nitpicking' also How SHOULD we teach Electricity? "Static" sparks Doorknob sparks and zapping yourself on the car door... and people who suffer from an "electric shock" disease.
The Planets Employing computer graphics, space race archive material and first-hand testimony from scientists around the world, The Planets is comprehensive and spectacular account of space exploration and discovery. This series is a historical production about the history of space travel including both Russian and American perspectives. It focuses each episode on a topic like the sun, atmosphere, giants, moon etc... The film footage on both country's programs reaches from the Sun to Neptune and the moons in between. Different Worlds: A look at space travel and the latest planetary explorations.Terra Firma: The story of the pioneering missions to our neighboring worlds.Giants: Uncovers the secrets surrounding the massive planets in our Solar System.Moon: The answer to one of the greatest mysteries of our Solar System - why does Earth have a moon? This documentary is available for preview only - .
Google: Behind the Screen What if all the information in the world was categorized and easily searchable? What if all the news from around the world, all books, written texts, photos and videos that exist on a place in the world would be collected, and would be available everywhere? That is precisely the goal of Google and it will not be long for it to be realized. Tegenlicht visits the head office of Google in Mountain View, California and spoke with Vint Cerf, who commissioned by the American army is the forerunner of the developed Internet. Google grows like a cabbage and they continue to hire more and more smart people in order to achieve their company goal faster. But in China to cooperate in censorship, Google have lost a lot of confidence. Watch the full documentary now
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