ELI5: Explain Like I'm 5

Flicker fusion threshold

Hello little one! Have you ever watched a movie or played a video game and noticed that sometimes the screen seems to be flickering rapidly? That is called flicker, and it can be really distracting and annoying, right?

Well, sometimes we want to show images or videos that are changing quickly, but we don't want them to look like they are flickering. We want them to look like smooth, continuous motion. That's where the flicker fusion threshold comes in!

The flicker fusion threshold is the speed at which an image or video must be shown so that it appears to be a continuous, non-flickering motion instead of a series of separate frames. Imagine that you are watching a video of a ball rolling across the screen. If the video is shown too slowly, you might see the ball move a little bit and then disappear for a moment before you see it move again. That's called flicker, and it can be really distracting! But if the video is shown at the right speed, the ball will appear to move smoothly from one side of the screen to the other.

So, the flicker fusion threshold is the minimum speed at which an image or video must be shown so that our brains can't detect any flicker. It's like a magic number that makes everything look smooth and continuous, even if it's actually made up of separate frames.

Does that make sense, little one?