What is light really made of, a wave or a particle?
Light's Double Life
What is light really made of, a wave or a particle?
Here's a question that has tied up the smartest people on Earth for centuries: what is light actually made of? You'd think we'd know. We see it every single day. But light has a habit of giving two different answers, and both of them are right. Buckle up.
For a long time, the leading idea was that light is a wave. Picture a stone dropped in a pond — ripples spreading out in smooth, rolling rings. Light seemed to do the same thing, just way faster and invisibly. Waves were neat, tidy, and easy to imagine.
