At sufficiently cold temperatures, the atoms in a gas can form what is known as a Bose-Einstein condensate (BEC), losing their individual identities and merging into a single quantum state. The phenomenon has fascinated physicists ever since gaseous BECs were created in the laboratory in 1995 (although the possiblity was first postulated some 70 years earlier), and a flurry of recent research has uncovered all kinds of remarkable condensate properties. Now researchers writing in the journal Nature ha
Jubilant astronomers today unveiled humankind`s most spectacular views of the Universe as captured by the NASA/ESA Hubble Space Telescope`s new Advanced Camera for Surveys (ACS). They also reported that Hubble is operating superbly since the March servicing mission and are looking forward to more pictures from the newly revived NICMOS camera.
“The ACS is opening a wide new window onto the Universe. These are among the best images of the distant Universe humans have ever seen,” says Johns Hop
A novel prototype light meter has been developed by researchers in New York. Published today in the Institute of Physics journal, Measurement Science and Technology, this new retinal flux density meter will provide an affordable tool for measuring light at all levels and might ultimately lead to new standards to improve both energy efficiency and safety at night.
The retina in the eye detects light using cells called rods and cones. At high light levels, such as in daylight, the cones detec
Desire drives remote-controlled rodents.
Remote-controlled rats could soon be detecting earthquake survivors or leading bomb-disposal teams to buried land mines.
Signals from a laptop up to 500 metres away make the rats run, climb, jump and even cross brightly lit open spaces, contrary to their instincts. The rodents carry a backpack containing a radio receiver and a power source that transmits the signals into their brains through electrical probes the breadth of a hair.
A new technique has been developed by researchers in the Netherlands to look at the effect of radiation from mobile phones on complex structures like the inner ear and eye. The technique called `quasistatic zooming` will help researchers calculate the amount of radiation from mobile phones absorbed by human tissue on scales of less than one millimetre. The work is published today in the Institute of Physics journal, Physics in Medicine and Biology.
Concern about the potentially hazardous e
The promising link between certain properties in human hair which could have potentially helped in diagnosis of breast cancer is “dubious” according to research published today in the Institute of Physics journal, Physics in Medicine and Biology. Dr Mark Sutton of the McGill University in Canada and colleagues have found no clear association between peaks seen in what is known as small angle x-ray scattering and the risk of breast cancer, as had been reported previously in the journal Nature (James e