The Big Picture
That is a very good question, Kyla. There are a few things you need to know
about before I can answer that. First, you can think of the image on your
television screen as a collection of many dots of light.
Now I see them! They were just too small for me to see individually before.
But that doesn't explain why only some of them showed up on my photograph.
There must be something else going on.
You're right. The reason you didn't see the whole picture is because not all
of the dots are shown at the same time. Take a look at the following
Oh I get it! The faster the dots are lit up, the more it looks like what I
see on my television.
Yes, if the dots light up fast enough our eyes don't see a sequence of dots, but they all look
like they are lit at once. This happens because we continue to see a dot as lit up for a short time
after it has become dark. It's called persistence of vision.