National Physical Laboratory:

About the Author

The National Physical Laboratory (NPL), established in 1900 as the UK's national standards laboratory, has long been at the forefront of scientific measurement and innovation. Tasked with maintaining and advancing the UK's measurement standards, NPL's publications serve as authoritative resources for researchers, engineers, and policymakers worldwide. Drawing on the expertise of its world-class scientists, these works provide precise definitions, methodologies, and practical guidance on fundamental physical quantities. Through rigorous documentation and updates reflecting cutting-edge research, NPL ensures the accuracy and reliability of measurements that underpin global science, technology, and commerce, fostering advancements in fields from energy to telecommunications.