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Kostnadsfri provperiod på The Great Courses Signature Collection eller köp
Avsnitt
- S1 A1 – The Strangest Force30 augusti 201333minBegin your exploration of gravity with Isaac Newton and the famous story of the apple. Why was it such a breakthrough to connect a falling apple with the faraway moon? Review the essential characteristics of gravity and learn why small asteroids and large planets have such different shapes.#Science & MathematicsKostnadsfri provperiod på The Great Courses Signature Collection eller köp
- S1 A2 – Free Fall and Inertia7 oktober 201329minReview three great discoveries by the "grandfather" of gravity research, Galileo Galilei. His most famous experiment may never have happened, but his principle of inertia, law of free fall, and principle of relativity are the basis for everything that comes later in the science of gravity--including key breakthroughs by Einstein.Kostnadsfri provperiod på The Great Courses Signature Collection eller köp
- S1 A3 – Revolution in the Heavens30 augusti 201328minDrawing on ideas and observations of Nicolaus Copernicus and Tycho Brahe, Johannes Kepler achieved a great insight about gravity by discovering three laws of planetary motion, relating to the mathematics of orbits. The cause of planetary motion, he determined, must lie in the sun.Kostnadsfri provperiod på The Great Courses Signature Collection eller köp
- S1 A4 – Universal Gravitation30 augusti 201328minSee how Newton was able to finish Kepler's revolution by formulating the law of universal gravitation, which says that every object exerts an attractive force on every other object. Also explore Newton's related discovery of the three laws of motion, which underlie the science of mechanics.Kostnadsfri provperiod på The Great Courses Signature Collection eller köp
- S1 A5 – The Art of Experiment30 augusti 201330minLearn how distances in the solar system were first determined. Then chart Henry Cavendish's historic experiment that found the value of Newton's gravitational constant. Cavendish's work allows almost everything in the universe to be weighed. Then see a confirmation of the equivalence principle, which says that gravitational and inertial mass are identical.Kostnadsfri provperiod på The Great Courses Signature Collection eller köp
- S1 A6 – Escape Velocity, Energy, and Rotation30 augusti 201329minBegin the first of several lectures that dig deeper into Newton's laws than Newton himself was able to go. In this lecture, apply the key concepts of energy and angular momentum to study how gravity affects motion. As an example, use simple algebra to calculate the escape velocity from Earth.Kostnadsfri provperiod på The Great Courses Signature Collection eller köp
- S1 A7 – Stars in Their Courses--Orbital Mechanics30 augusti 201329minNewton was the first to realize that objects could, in theory, be sent into orbit around Earth. Explore how this works in practice, using the ideas of energy and angular momentum to study how satellites, moons, planets, and stars move through space.Kostnadsfri provperiod på The Great Courses Signature Collection eller köp
- S1 A8 – What Are Tides? Earth and Beyond30 augusti 201330minTrace the origin of tides to the simple fact that gravity varies from point to point in space. This leads not just to the rise and fall of the ocean, but to the gradual slowing of Earth's rotation, Saturn's spectacular ring system, volcanoes on Jupiter's moon Io, and many other phenomena.Kostnadsfri provperiod på The Great Courses Signature Collection eller köp
- S1 A9 – Nudge--Perturbations of Orbits30 augusti 201328minFor the next three lectures, study the effects of gravity on the motions of more than two bodies. Here, see how even very small orbital changes--small perturbations--are significant. Such effects have revealed the presence of unknown planets, both in our own solar system and around other stars.Kostnadsfri provperiod på The Great Courses Signature Collection eller köp
- S1 A10 – Resonance--Surprises in the Intricate Dance30 augusti 201329minResonance happens whenever a small periodic force produces a large effect on a periodic motion--for example, when you push a child on a swing. Learn how resonance due to gravitational interactions between three bodies can lead to amazing phenomena with planets, asteroids, and rings of planets.Kostnadsfri provperiod på The Great Courses Signature Collection eller köp
- S1 A11 – The Million-Body Problem30 augusti 201332minConsider the problem of gravitational interactions between millions of bodies, such as the countless stars in a galaxy. Amazingly, mathematics can reveal useful information even in these complicated cases. Discover how the analysis of the motions of galaxies led to the prediction of dark matter.Kostnadsfri provperiod på The Great Courses Signature Collection eller köp
- S1 A12 – The Billion-Year Battle30 augusti 201330minExplore the physics of stars, which are balls of gas in a billion-year battle between the inward pull of gravity and the outward pressure produced by nuclear fusion. Follow this story to its ultimate finish--the triumph of gravity in massive stars that end their lives as black holes.Kostnadsfri provperiod på The Great Courses Signature Collection eller köp
- S1 A13 – From Forces to Fields30 augusti 201331minFor the rest of the course, focus on the revolutionary view of gravitation launched by Albert Einstein. Review new ideas about fields that allowed physics to extend beyond Newtonian mechanics. Then see how Einstein modified Newton's laws and created the special theory of relativity.Kostnadsfri provperiod på The Great Courses Signature Collection eller köp
- S1 A14 – The Falling Laboratory30 augusti 201331minEinstein focused on gravity in his general theory of relativity. Hear about his "happiest thought"--the realization that a man in free fall perceives gravity as zero. This simple insight resolved a mystery going all the way back to Newton and led Einstein to the startling discovery that gravity affects light and time.Kostnadsfri provperiod på The Great Courses Signature Collection eller köp
- S1 A15 – Spacetime in Zero Gravity30 augusti 201329minIn an influential interpretation of relativity, Einstein's former mathematics professor Hermann Minkowski reformulated the theory in terms of four-dimensional geometry, which he called spacetime. Learn how to plot events in this coordinate system in cases where gravity is zero.Kostnadsfri provperiod på The Great Courses Signature Collection eller köp
- S1 A16 – Spacetime Tells Matter How to Move30 augusti 201331minSee how gravity affects Minkowski's spacetime geometry, discovering that motion in a gravitational field follows the straightest path in curved spacetime. The curvature in spacetime is not caused by gravity; it is gravity. This startling idea is the essence of Einstein's general theory of relativity.Kostnadsfri provperiod på The Great Courses Signature Collection eller köp
- S1 A17 – Matter Tells Spacetime How to Curve30 augusti 201330minThe curvature of spacetime depends upon matter--and tidal effects. In this lecture, see how ordinary tidal effects reveal a simplified form of Einstein's greatest discovery: the equation governing the curvature of spacetime by matter.Kostnadsfri provperiod på The Great Courses Signature Collection eller köp
- S1 A18 – Light in Curved Spacetime30 augusti 201330minSee how Einstein's general theory of relativity predicts the bending of light in a gravitational field, famously confirmed in 1919 by the British scientist Arthur Eddington. Learn how this phenomenon creates natural gravitational lenses--and how the bending of light reveals invisible matter in deep space.Kostnadsfri provperiod på The Great Courses Signature Collection eller köp
- S1 A19 – Gravitomagnetism and Gravitational Waves30 augusti 201331minThe general theory of relativity predicts new phenomena of gravity analogous to those of electromagnetism. Discover how ultra-sensitive experiments have detected the gravitomagnetism of the Earth, and follow the search for elusive gravitational waves that travel through space.Kostnadsfri provperiod på The Great Courses Signature Collection eller köp
- S1 A20 – Gravity's Horizon--Anatomy of a Black Hole30 augusti 201333minPlunge into the subject of black holes, which are massive objects that have collapsed completely under their own gravity. Learn how black holes distort spacetime and explore the supermassive black holes that lie at the hearts of galaxies. Then ask: Are there such things as micro-black holes?Kostnadsfri provperiod på The Great Courses Signature Collection eller köp
- S1 A21 – Which Universe Is Ours?30 augusti 201330minInvestigate what Einstein called his "greatest mistake"--his rejection of his own theory's prediction that spacetime should be dynamic and evolving. Chart the work of a group of scientists, including Alexander Friedman, Georges Lemaître, and Edwin Hubble, who advanced the realization that our universe is expanding from an apparent big bang.Kostnadsfri provperiod på The Great Courses Signature Collection eller köp
- S1 A22 – Cosmic Antigravity--Inflation and Dark Energy30 augusti 201332minIn this lecture, investigate cosmic antigravity, starting with cosmic inflation, a phenomenon that exponentially increased the size of the universe during the big bang. Then, learn why dark matter cannot be made of ordinary protons and neutrons, and explore the recent discovery that the expansion of the universe is accelerating, powered by a mysterious dark energy inherent in space itself.Kostnadsfri provperiod på The Great Courses Signature Collection eller köp
- S1 A23 – The Force of Creation30 augusti 201329minUse a black hole to test the laws of thermodynamics, taking a deeper look at the capacity of gravity to pull matter together and increase entropy at the same time. Probe Stephen Hawking's most surprising discovery, and then learn that the same force that pulls the apple down and steers the stars in their courses is also nature's ultimate source of order and complexity.Kostnadsfri provperiod på The Great Courses Signature Collection eller köp
- S1 A24 – The Next Revolution30 augusti 201332minSurvey the greatest unsolved problem in theoretical physics: the search for a quantum theory of gravity. Examine string theory, loop quantum gravity, and also entropic gravity, which suggests a revolutionary link with thermodynamics. Close the course with a deepened appreciation for the connection between everyday features of gravity and the most exciting questions in physics and cosmology.Kostnadsfri provperiod på The Great Courses Signature Collection eller köp
Detaljer
Mer information
- Ljudspråk
- English
- Undertexter
- English [CC]
- Producenter
- The Great Courses
- Rollbesättning
- Benjamin Schumacher
- Studio
- The Great Courses
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