ELI5: Explain Like I'm 5

Photonic radar

Photonic radar is a type of radar (a tool that helps detect different objects) that uses light instead of radio waves to detect objects. Radar works by sending out a beam of energy (radio waves or light), then measuring the time it takes for the energy to hit an object and bounce back. Photonic radar works in the same way, only it uses light (which travels much faster than radio waves) instead of radio waves so it can detect things much faster and from farther away.