What is ray tracing and what hardware and games support it?

If you're a gamer, then the chances are you've heard of ray tracing, but you might not know exactly what it means or why it's a big deal. We're here to help you find out.

Source : https://www.pocket-lint.com/games/news/nvidia/148279-what-is-ray-tracing-and-what-hardware-and-games-support-it/