A solar-powered airplane finished crossing the United States on Saturday, landing in New York City after flying over the Statue of Liberty during its historic bid to circle the globe, the project team said. The spindly, single-seat experimental aircraft, dubbed Solar Impulse 2, arrived at New York's John F. Kennedy International Airport at about 4 a.m. local time after it took off about five hours beforehand at Lehigh Valley International Airport in Pennsylvania, the team reported on the airplane's website. Such a pleasure to land in New York! For the 14th time we celebrate sustainability," said the project's co-founder Andre Borschberg on Twitter after flying over the city and the Statue of Liberty during the 14th leg of the trip around the globe. The Swiss team flying the aircraft in a campaign to build support for clean energy technologies hopes eventually to complete its circumnavigation in Abu Dhabi, where the journey began in March 2015. The solar cr...
Peeking through a keyhole has become even more useful. An imaging
technique that measures the path of a laser to build up a
three-dimensional picture could now let spies map an entire room through
a tiny hole.Looking through the keyhole could soon reveal far more than you imagine.
Scientists have developed a device that could map an entire room simply by shining a laser through a 2cm gap.The system worked by firing short laser pulses at a nearby wall,
bouncing light around a corner to a hidden object, which then bounces
some of it back to a camera next to the laser.
The system could be used in applications such as firefighting, battlefield surveillance and disaster recovery operations.
The
technology is the work of Harbin Institute of Technology in China and
is based on a laser that can see around corners, according to a report
by Jacob Aron at the New Scientist.
The
system worked by firing ultrafast laser pulses at walls 'behind' an
area that can't be seen, to capture a ghostly 3D reflection.
The
technique is similar to using a mirror to see round a corner -
but
instead of a mirror, the 'reflection' is reconstructed from laser light
that scatters back off a wall.
The
camera 'times' the beams of light as they bounce back to its sensors,
and builds an image, which is slightly wobbly, but precise to ranges of
just one centimetre.
The
group’s latest project has built on this technology to measure the 3D
shape and position of three cardboard letters, spelling HIT, through a
2cm hole in a wall.
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