 Welcome back to Kids Bend Science. My name is Ken. Today's experiment is how to make a CD rainbow. I'll have about four different experiments. As always, adult supervision is required. What you need for this experiment is a flashlight, a lighter, a candle, plate, and a CD. So I have four different experiments I'll be showing you. This one here is the first one and all I'm doing is holding the CD up into the natural light and then angling it in different angles to be able to create that rainbow. As you can see it'll be small, big, you can hold it closer to the wall or angle it into different degrees. So the second experiment is I'm using a short candle about an inch long and I just put some hot wax in the middle of the plate and then put the candle on it. You can use clay and then from there you light it and then the angle of the light since it's a short candle is going to pick up the rays inside the CD a lot different than the natural light from the sun. As you can see when I pull up higher you almost get the whole entire CD to light up which is pretty cool. So the third experiment I'm just using a full-sized candle so the angle of the light is going to be a little higher and you'll therefore get a little bit different color variation. So the science behind why a CD reflects the rainbow colors is like water drops and falling rain. The CD separates the white light into all the colors that it makes up. So the colors that you're seeing reflecting from the CD are interference colors like the shifting colors you see on a soap bubble or on an oil slick. So you could think of light as being made up of waves like the waves in the ocean. When the light waves reflect off the ridges of the CD they overlap and interfere with each other and sometimes the waves add together and making certain colors brighter and other times they cancel each other out making certain colors go away. So that's why the angle of the CD or the angle you're looking at it recreates different colors. So the fourth experiment is in a dark room with a flashlight and your CD and by angling it in different angles you're going to see that you're able to create different variations of colors right. So as you can hold this straight down or over it builds that rainbow color to the side of the wall and then taking it one step further this time I'm using the light of my cell phone or reflecting it off the CD and you can see the centerpiece picks it up and kind of makes these really cool designs when shiny when it reflects on the different angles towards the side of the wall right which I found pretty interesting. So I hope you enjoyed this video. If you did please click thumbs up and to subscribe and thanks for watching.