The Magic of Light Interference

Adding two light waves together can create complete darkness. It’s called destructive

interference, and it’s the magic behind the beautiful colors you see on a soap bubble.

Here's how it works: when light hits a thin film, like a bubble's wall,

some of it reflects off the top surface, and some reflects off the bottom. These two reflected

waves then meet and interfere. Depending on the film's thickness, some light waves

cancel each other out, while others get amplified. The colors you see

are the ones that survived. So, those shimmering rainbows aren't

pigments; they're just light playing tricks with itself.