Subscribe now

Physics

A microscopic diving board can cheat the second law of thermodynamics

Working with a tiny cantilever, physicists managed to violate the second law of thermodynamics, using less energy than expected to change the cantilever’s motion

By Karmela Padavic-Callaghan

12 July 2024

Splash of a springboard diver

Not all diving boards obey the laws of thermodynamics

vm/Getty Images

A microscopic version of a diving board has been driven to cheat the second law of thermodynamics 95 per cent of the time. The finding doesn’t challenge the validity of the law, but underscores how different the rules of the microscopic world can be.

The behaviour of our world is constrained by this physical law. Among other things, it sets the minimum energy expended for changing the state of something, such as putting an idle motor into a steady and controlled state of motion.

But everything is different when…

Sign up to our weekly newsletter

Receive a weekly dose of discovery in your inbox! We'll also keep you up to date with New Scientist events and special offers.

Sign up

To continue reading, subscribe today with our introductory offers

View introductory offers

No commitment, cancel anytime*

Offer ends 2nd of July 2024.

*Cancel anytime within 14 days of payment to receive a refund on unserved issues.

Inclusive of applicable taxes (VAT)

or

Existing subscribers

Sign in to your account