95 results found for light

Quasicrystals - or, as Shechtman would prefer, quasi-periodic materials - now have scientists thinking about matter in a new light, but they also have many possible practical applications. Because of their uneven structure, quasicrystals do not have ....

Throughout the 20th century it was widely accepted that a light microscope relying on conventional optical lenses cannot discern details that are much finer than about half the wavelength of light (200-400 nm), due to diffraction. However, in the 199....

Sophie and Stephanie take a light-hearted look at solar energy.

Fossil resources are limited and their CO2 emission strongly contributes to the global warming which is mainly responsible for the increasing appearance of natural catastrophes. Renewable biomass which can be converted into various forms of usable en....

The accidental discovery of this wonderful tool has changed the face of biology.

This presentation explores the way in which the ideas and advances of people like Copernicus, Galileo and Kepler to Newton and Leibniz laid the foundations of Science.  The Enlightenment was a byproduct of this philosophical breakthrough and right f....

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 ....

The fantastic progress made in medicine led the scientific community to hope about the complete eradication of infectious diseases in the middle of the 20th century. The sudden emergence of AIDS in the early 80's cruelly reminded us that this dream ....

Light quanta are the fundamental units of radiant energy. When propagating freely they travel at the fastest attainable speed and live forever. These properties recommend them as the ideal messengers for communication of all sorts. Ordinary light ....

By careful investigation of relic left on the cosmic scene we have very good evidence and constraints on what has occurred since the beginning of the Universe. This talk reviews the evidence including images and information from the very first light....

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....

For cancer diagnosis and therapy, we are developing activatable cell-penetrating peptides (ACPPs), synthetic molecules with a novel amplifying mechanism for homing to diseased tissues. ACPPs are polycationic cell-penetrating peptides whose cellular ....