When setting up a shot or using external light we all know that the light travels in a straight line, right? Not in all circumstances if new scientist’s research is anything to go by. This morning’s Metro newspaper shows how scientists are controlling light using holograms designed using ‘knot theory’, that makes the light flow in whirls and eddies.

Dr Mark Dennis, from Bristol University, says, ‘In a light beam, the flow of light through space is similar to water flowing in a river. Although it often flows in a straight line – out of a torch, laser pointer, etcetera – light can also flow in whirls and eddies, forming lines in space called ‘optical vortices’. Along these lines the intensity of light is zero, so black. The light all around us is filled with these dark lines, even though we can’t see them.’

This technique is said to pave the way for a new level of precision in laser technology… We don’t think it’s going to change the course of your photography, but you sure can learn something new every day.