Have you ever wondered how speed guns measure the speed of moving vehicles or how an athlete's sprint speed is recorded? Normally these speed sensors work with radar or laser technology to bounce back ...

Cloudy. High chance of showers about the Dandenongs, medium chance elsewhere. Winds westerly 25 to 35 km/h decreasing to 15 to 25 km/h in the evening. Sun protection recommended from 9:40 am to 2:50 ...