However, the sensor is not that sensitive to UV-C light, so [Akiba] had to do a bit of minor surgery on the circuitry that surrounds the sensor to tweak the output. The sensor was designed to ...

It’s much more durable than standard air-dry polishes, but it requires UV light to cure. [Becky] bought a lamp to use at home, but it’s very bulky and must be plugged into the wall.

Discuss why it is important that sunglasses filter out UV light. It’s important that all sunglasses carry a UV400 mark. This means that the lens is blocking all the harmful UV. Design an ...