'Sunwatch' to Detect Harmful UV Rays
Scientists at Nanotechnology Laboratory of Macquarie University's School of Engineering, Australia have developed a watch-like device that could save thousands of lives by alerting its wearers to harmful ultraviolet rays that can cause skin cancer. At the heart of the device named ‘Sunwatch’ is a tiny nano-sensor, the size of a fingernail. The wearer has to enter the skin type information and the device measures current UV rays and suggests measures to decrease sun exposure. This advice includes 'put on sunnies' or 'wear a broad brimmed hat' or 'go in the shade. The UV index created by the World Health Organisation ranges from 1 to 11+, depending on the weather and cloud cover.