The glass-like plate at the centre of the photograph is the angular filter. A beam of white light is incident from the right at Brewster's angle and is transmitted through the filter. The red beam of ...

Concrete contractors are no strangers to project changes. Advance Construction, Vancouver, B.C., recently was tasked with the job of turning two purpose built slabs specified for vinyl tile into ...

Wee Willie Winkie investigates light and reflective materials. He chooses the most suitable equipment for going out on a dark night. Wearing reflective materials helps other people to see you in the ...