Scientists Just Discovered That Light Can Create Friction—No Contact Required

Friction normally needs two surfaces rubbing together. Physicists just proved light can do the job all by itself.
Phys.org

Lighting a fire using friction requires an understanding of physics principles—there are ways to make the process easier

Humans have been making fire using friction for thousands of years, with evidence of its use found in archaeological records across different cultures worldwide. Fire by friction is a testament to ...