Fringe visibility

Hello there little one! Have you ever looked at light and noticed that sometimes it looks bright and other times it looks dim? Well, that's because light can have a thing called "fringe visibility".

Fringe visibility happens when light waves are combined together. Imagine taking two flashlights and shining them at the same spot on a wall. Sometimes when you shine them together, the light from each flashlight will combine to make a brighter spot on the wall. Other times, the light waves will cancel each other out and make a darker spot on the wall instead.

Fringe visibility is a way to measure how well these light waves line up with each other, kind of like how if you try to build a tower out of blocks, you want them to all stack on top of each other. If the light waves are lined up perfectly, then they will make a very bright spot on the wall. But if the waves are not lined up quite right, it will make a dimmer spot on the wall.

Scientists use fringe visibility to study things like light interference, which is when light waves meet and create patterns of light and dark spots. They can also use it to find out more about the properties of light and how it behaves.

So, there you have it! Fringe visibility is when light waves combine and either make a very bright spot or a dimmer spot, depending on how well they're lined up. It's a way scientists study light and learn more about it!