A house I walk past on the school run has recently installed an ultrasonic animal scarer – presumably to deter the urban foxes that are prevalent in the area. These devices are supposed to emit ultrasound that is too high for humans to hear, but makes a frightening or unpleasant noise for animals, who haveContinue reading “Ultrasonic animal scarers”
Tag Archives: science
Frickin’ laser
A friend of mine is a researcher in the field of chemical physics. This week, he invited me to his lab to take a photograph of his 5 megawatt laser, which strikes a copper target and makes a plume of plasma that lasts for just a few fleeting nanoseconds. Normally, I like taking photos ofContinue reading “Frickin’ laser”
Jonathan Gazeley 