Torsional pendulum (IMAGE) Optica Caption The video shows a torsional — or turning — pendulum device made from the graphene-SiO2 composite structure. When it is irradiated with laser light, the pendulum turns toward the light. Credit Lei Wang, QingDao University of Science and Technology Usage Restrictions None License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.