(Phys.org)—By illuminating a thin film of water with ultrashort laser pulses, physicists have demonstrated that liquid water can generate terahertz (THz) waves, which are currently being researched for applications such as wireless data transmission, industrial quality control, and high-resolution imaging with the capability for penetration. Explore further Experimental setup for generating THz waves by focusing a laser beam onto a free-flowing water film. Credit: Jin et al. ©2017 American Institute of Physics This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only.