John Pendry is a really smart man who loves to think about how things work. He's really into something called physics, which is all about understanding the way that energy and matter interact with each other.
One of the things that John Pendry is famous for is something called metamaterials. These are special materials that are designed to have properties that don't exist in nature. For example, a metamaterial might be able to bend light in a way that normal materials can't.
To understand how cool this is, imagine you have a piece of paper. If you shine a flashlight at the paper, the light will just go straight through it. But if you had a metamaterial that was designed to bend light, you could use it to make the light curve around an object instead of going straight through it. This is really useful for things like making things invisible or creating super-powerful microscopes.
John Pendry is also known for his work on something called cloaking. This is the idea that you could use a special material to make something invisible to light or sound waves. It's like the ultimate hide-and-seek cheat code!
Overall, John Pendry is a brilliant scientist who loves to push the boundaries of what we know about physics. He's helped us understand things like metamaterials and cloaking, which could have all kinds of cool applications in the future.