light

By Leah Crane We have seen the light – in 3D video as it flies through the airScreengrab via Kazuhiro Morimoto An ultra-fast camera has captured a video of light as it bounces between mirrors. Although light isn’t normally visible in flight, some photons from a laser pulse will scatter off particles in the air…

By Donna Lu Colour-changing hair dye and skin patches that show UV exposureAlex Mariakakis et al. 2020 Colour-changing stickers and hair dye that react to ultraviolet light could help people gauge when they’re at risk of sunburn. Alex Mariakakis at the University of Washington in the US worked with a team at Microsoft to develop…

The central line, which serves commuters in Mitchells Plain and Khayelitsha, has been closed since October last year due to vandalism.Transport Minister Fikile Mbalula said earlier this year that full service was expected to be restored by April 2021.But a Prasa administrator on Tuesday revealed a revised timeline towards the end of next year.Commuters in…

Home News A handful of N95 respirators get zapped with UV radiation. (Image: © Shutterstock) Ultraviolet light has been used to stop pathogens in their tracks for decades. But does it work against SARS-CoV-2, the virus behind the pandemic?The short answer is yes. But it takes the right kind of UV in the right dosage,…

Minister of Sport, Arts and Culture Nathi Mthethwa announced on Friday the approval of seven additional sports to resume training and matches during Level 3 of the coronavirus lockdown.The following professional sports are now allowed to resume training and host matches:• Cricket SA • South African Anglers and Casting Confederation • SA Gymnastics Federation • Tennis…