Centre of mass
In finite objects, the total external force equals the total mass times the acceleration of a point called the centre of mass.
More details | Watch nowCentripetal force – how do we measure it?
A short video showing a simple classroom method of checking the way in which this force is related to mass, speed and radius.
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Uniform circular motion: angular displacement and velocity are introduced and centripetal acceleration is determined.
More details | Watch nowCold Atomic Gases: the Intersection of Condensed Matter and Atomic Physics
During the past decade laser cooling and evaporative cooling of atoms have produced quantum degenerate gases both of bosons (Bose-Einstein condensates) and of fermions (gases with temperatures below the Fermi temperature). Such gases can provide ana....
More details | Watch nowColor Theory
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....
More details | Watch nowCommunicating with light
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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A brief look at the Physics behind sending signals along cables and via geostationary satellites. An experiment to measure the speed of an electrical pulse in a cable is described and the Physics of the orbits of communcations satellites is develope....
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The main problems associated with communicating with distant space probes like Voyager 1 are investigated. The role played by diffraction in limiting the amount of power receivable on Earth is discussed. The further problems of reaching a nearby st....
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Physics' students Rosie & Carine explain the physics behind concert hall acoustics.
More details | Watch nowControlling Photons in a Box and Exploring the Quantum to Classical Boundary
The founders of quantum theory assumed in 'thought experiments' that they were manipulating isolated quantum systems, obeying the counterintuitive laws which they had just discovered. Technological advances have recently turned these virtual experi....
More details | Watch nowCosmic Rays: the Most Energetic Particles in the Universe
Astrophysical objects are able to accelerate atomic nuclei to energies 10^7 times more than man made accelerators such as LHC. _Particles arrive at earth from space with energies as great as 50 joules, a macroscopic energy in a microscopic particle.....
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