212 results found for physics

One of the most remarkable results of astro-particle Physics has been the success of the Standard Model, recently culminated in the discovery of the Higgs particle (Ho). However, the Ho is observable only in few channels at the LHC, in the presence o....

On scales much bigger than the wavelength, rays explain the behaviour of interfaces, mirrors, lenses, optical instruments, including telescopes and microscopes.

Gerardus 't Hooft, the Netherlands shared the Nobel Prize in Physics in 1999 with Martinus J.F. Veltman, the Netherlands 'for elucidating the quantum structure of electroweak interactions in physics'. He came from a family of intellectuals. His great....

A presentation showing both the ideas about centripetal force and a simple classroom method of checking the way in which this force is related to mass, speed and radius.

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....

The inverse square law explains planetary motion - and apples falling. Newton's law, measuring G, calculating orbits.

In 2000 Herbert Kroemer, who was born in Germany, and works at UCSB in the USA shared half of the Nobel Prize for Physics with Zhores I. Alferov ( Russia ) 'for basic work on information and communication technology' and in particular 'for developing....

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Studies of nuclear stability using gamma-ray spectroscopy. Use in security scanning; PET scans;

Seeing atoms using electons rather than lenses

A short video explaining how transistors work.  At the heart of our high-tech society with radios, mobile phones, computers and space exploration are tiny electronic components called transistors.  They have revolutionised electronics and in the pr....

An elegantly simple optical diffraction demonstration with an inexpensive laser pointer is used to show the way in which x-rays can reveal the structure of crystals, and in particular, the double helix structure of DNA.

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.

This short documentary explains why the Large Hadron Collider was built and what scientists are using the collider to look for.

30-minute lecture about the physics of hyperfine interactions, and about how to calculate hyperfine interactions by the WIEN2k DFT code

Looking at how hard disk drives can be improvedn

Searching for the mysterious magnetic monopole.

Superposing waves with different frequencies gives beats and Tartini tones. Removing beats gives consonance. Tuning consonances gives temperament.

A look at what was known when Newton started to develop his theory of gravitation and how he used these ideas and data to make his great forward step

Ivar Giaever won the Nobel Prize in 1973 for his investigations of tunneling in semiconductors and superconductors. Giaever worked on metal thin films and tunneling and took a Solid State physics course. Although he knew nothing about Superconductivi....

The simple Balmer spectrum of atomic hydrogen has provided the Rosetta stone for deciphering the strange laws of quantum physics during the early 20th century.  Four decades ago, Doppler-free laser spectroscopy opened a new chapter in the exploratio....