An astronomer suggests an idea to piggyback on the ambitious Breakthrough Starshot project that aims to send nano spacecraft to Alpha Centauri at a major fraction of the speed of light.
LiDAR, was used to “redraw” the remains of the city, along the lower western slopes of the Suikerbosrand hills near Johannesburg.
Karim Sadr
New research may help us to look for messages from alien civilisations.
Example of nonlinear effect which can be observed in an optical fiber. All the colors of the rainbow are generated at the output while only one color is present at the entrance. We’re talking about supercontinuum.
To understand what is happening in an optical fibre, physicists can mimic a rupture of the flow of grains of light – the photons – thanks to a laser device.
Space lasers developed in the 1970s are being put to a brand new use.
Optical elements of the experimental setup allowing to obtain visible-spectrum laser pulses as short as 10 femtoseconds.
Courtesy of Dr. R. Borrego-Varillas and Prof. G. Cerullo, University Politecnico Milan (Italy)
It’s taken centuries for our understanding of gravity to evolve to where it is today, culminating in the discovery of gravitational waves, as predicted by Albert Einstein a century ago.
Chuo Shinkansen is a Japanese mag-lev train.
Saruno Hirobano /wikimedia
Using fluorescent dye, researchers figured out how to turn cells into lasers – with applications for cell tagging and tracking as well as medical diagnoses and therapies.
During these dark winter months, spare a thought for artificial lights. From strings of lights adding holiday cheer to artificial sunlamps alleviating seasonal affective disorder, they brighten our days…