Editing Stroboscope (section)

===Short Explanation===

This demonstration is focusing on the effect known as '''''Temporal Aliasing'''''. Temporal Aliasing is when an object is moving quickly, or an image is changing rapidly, and the motion is too fast for our eyes to follow. Our brains then receive the blurred image, and try to process it as a non-blurry image. The result is that we "see" a pattern or motion that isn't actually there. This effect, when used on images, is how we developed movies and videos! a video camera will take a bunch of pictures every second (usually between 30 and 40 fps), and by flashing the images at our eyes really quickly, we "see" the movement in the video happen! Animated shows, such as cartoons, usually use a fewer number of images per second, so with an animated show we can actually see the tiny "jumps" in-between the pictures.

For the Color Wheel, we are using this effect to see how the colors of light mix together. The wheel has only four colors on it: Red, Green, Blue, and a little bit of White. When it is spinning really fast, and we don't have the strobe light on, we only see a purple-pink blur. This is because the colors are blurring past each other as we look at it, so our brains, rather than try to separate each color, will blend them together. When we flash the light at a medium speed, we see the colors start to blend, giving us Cyan (Blue-Green), Magenta (Red-Blue) and Yellow (Red-Green). When the light is flashing really fast, we start to see other colors as well, but especially more white! This is because colors of light are ''additive'', meaning they give more colors as they blend. Paints and dyes, however, are ''subtractive'', meaning they absorb more colors as they blend. White light gives out all colors, and black paint absorbs all colors. White paint reflects all colors, and black light would just be no light at all. The "black lights" we use are actually violet!