Graphene
A magnetic tunnel junction is a device with two magnets separated by a very thin non-magnetic barrier. The two magnets can be aligned parallel or antiparallel. The electrical resistance of this devices depends on the alignment. This video illustrates....
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askFSU 1 : speed of light, tachyons, solar sails, and black holes
Joining Philip Schlenoff is Dr. Jeff Owens, from the Physics department at Florida State University, to answer some physics and astrophysics-related questions!
More details | Watch nowThe Long Road to the Higgs Boson – and Beyond
The discovery of the Higgs boson at CERNās LHC accelerator in 2012 by the ATLAS and CMS collaborations was the culmination of a decades-long search that had started in 1964 with the proposal of this unique particle, a signature of the origin of the....
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This video shows a terrific selection of superconducting demonstrations and explanations.
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30-minute lecture about the physics of hyperfine interactions, and about how to calculate hyperfine interactions by the WIEN2k DFT code
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Most of the data we generate and receive (whether emails, tweets, videos or mobile calls) are now carried by optical fibres, which use light to transmit vast quantities of information over trans-oceanic distances. The use of hundreds of wavelengths ....
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Longboard physics
A few (surprising?) thoughts on how the wheels on a longboard or skateboard actually move.
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Jonathan describes his adventures with a longboard and some different methods of making a speedometer for it.
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Abbie describes why bridges must be designed to counteract the effects of unwanted vibrations.
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Physics' students Rosie & Carine explain the physics behind concert hall acoustics.
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Early lighthouses used coil and wood fires before moving on to gas and then electricity powered lights.Ā Massive improvements took place by using a lens system around the light.Ā The development of the Fresnel lens brought what we now regard as the....
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Light, particularly sunlight, is believed to be good for our health. Many ancient civilisations even attributed it with mystical healing powers.Renowned for his entertaining lectures, Professor David Phillips, President of the RSC, uses his expertise....
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New carbon targets requires reducing emissions of greenhouse gases by 50% for 2030. This house believes that it will be impossible to meet the emissions reductions required to fulfil these obligations without the use of nuclear power. Ā Taking the pr....
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Music, architecture and acoustics in Renaissance Venice: Recreating lost soundscapes
During the Renaissance in Venice, composers such as the Gabrieli and Moneverdi created some of their greatest masterpieces for performance in the great churches on festive occasions. But what would the music have sounded like, given its complexity an....
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Sir Arnold Wolfendale FRS is Emeritus Professor of Physics at the University of Durham, and former Astronomer Royal. In 1912, Victor Hess embarked on a perilous balloon ascent and discovered the 'Cosmic Radiation', actually a beam of atomic particles....
More details | Watch nowThe search for a deeper understanding of our universe at the Large Hadron Collider
With the start of the Large Hadron Collider (LHC) at CERN, particle physics entered a new era. The LHC will provide a deeper understanding of the universe and the insights gained could change our view of the world, and the lecture will present some o....
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The physics of the eye, its performance and colour vision: refraction and accommodation; photoreceptors and resolution; compromises in visual performance.
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On scales much bigger than the wavelength, rays explain the behaviour of interfaces, mirrors, lenses, optical instruments, including telescopes and microscopes.
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White light comprises colours in the visible spectrum. The electromagnetic spectrum. Speed of light. Young's experiment and waves. Quanta and photons.
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Sound is produced in the larynx; filtering it in the vocal tract produces formants and phonemes. The acoustics, mechanics and some neurobiology of hearing. Pitch perception.
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Reflecting waves gives standing waves, which can be resonances. Standing waves on strings and in pipes and plates.
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Superposing waves with different frequencies gives beats and Tartini tones. Removing beats gives consonance. Tuning consonances gives temperament.
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Frequency, amplitude, envelope and spectrum affect pitch, loudness and timbre. All are discussed and quantified here.
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The Doppler effect
Moving either source or receiver produces a frequency shift called the Doppler effect, which we measure and analyse.
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Sound is a longitudinal wave of variations in pressure and density. We derive and measure its speed.
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The wave equation and its physical origin. Power in a wave and its relation to intensity in radiation.
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For my project I am giving a brief history of color theory with emphasis on how science and color theory have interacted. I focus on aspects like primary colors, how color is perceived, and the artists who were at the forefront of color and design. I....
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This presentation reviews how magnets work and their uses in the world today. It also explains how magnets and electricity are related and what future inventions could come from using magnets.
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In an extended medium, inertia and a restoring force can lead to waves, which reflect at boundaries, either erect or inverted.
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Inertia and restoring forces can, with low friction or damping, lead to oscillations and resonance. We analyse the mechanics of vibrations.
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The inverse square law explains planetary motion - and apples falling. Newton's law, measuring G, calculating orbits.
More details | Watch nowParticle Physics and the Mysteries of the Early Universe
Dr Cristina Lazzeroni, a Royal Society University Research Fellow from the University of Birmingham, reveals the secrets of the world's largest accelerator, the Large Hadron Collider and how the LHC experiments hope to answer big questions about the ....
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The LHC is the most powerful particle accelerator ever built. It is capable of recreating the very energetic conditions last seen in the universe a billionth of a second after the Big Bang, and allows particle physicists to study the fundamental ingr....
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Torques produce angular acceleration, moment of inertia 'resists' it. Rotational kinetic energy and angular momentum.
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Peeling sticky tape emits energy that extends into the X-ray regime, reports a study in Nature. The research provides evidence for a phenomenon that was first observed more than 50 years ago.nnIt is well known that unwinding sticky tape produces spar....
More details | Watch nowDark Matter, Dark Energy
Smoot's Nobel Prize was awarded for his analysis of that whisper from the Big Bang, the cosmic microwave background radiation. Today he hopes CERN's data will again transform our understanding of the universe. Young scientists Bilge Demirkoz and Benj....
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Awarded a Nobel Prize for using lasers to control and cool atoms, producing the Bose-Einstein condensation, Bill Phillips is eager to hear about new theories from young scientists like Hannah Venzl. An exciting dialogue develops between them on a boa....
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Fine tuning the frequencies of light gave John Hall a Nobel Prize, and helped transform the fields of precision measurement and information transmission. Iris Choi and Andrei Ghicov are young scientists excited by the ways physics can change our worl....
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David Gross's Nobel Prize was for work on the 'strong' force which acts between quarks inside the atom. Now he works on string theory, hoping to understand how all the forces of nature could be united. He believes the next steps may involve throwing ....
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p=mv. If external forces are zero, momentum is conserved. In collisions, energy may be conserved (elastic) or not (inelastic).
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