Roma Agrawal and Fran Scott speak to experts in metrology about the strange world of SI units, such as the amp, metre, kilogram, and why measuring electricity is a tricky business ⚡ #electronic #physics #atom #electricity The Royal Society is a Fellowship of many of the world's most eminent scientists and is the oldest scientific academy in continuous existence. ▶https://royalsociety.org/ Subscribe to our channel for exciting science videos and live events, many hosted by Brian Cox, our Professor for Public Engagement: https://bit.ly/3fQIFXB We’re also on Twitter ▶ https://twitter.com/royalsociety Facebook ▶ https://www.facebook.com/theroyalsociety/ Instagram ▶ https://www.instagram.com/theroyalsociety/ And LinkedIn ▶ https://www.linkedin.com/company/the-royal-society