Editing Stroboscope (section)

===Full Explanation===
''Aliasing'' is a distortion of a frequency or a signal, resulting in mis-identification. ''Temporal Aliasing'' is when we have a distortion caused by the length of time given for the frequency or signal. This effect is common, but it isn't an effect that we think about much because of how often we see it. The wheel, when spinning, is moving much too fast for our eyes to catch it. No matter what image is on the wheel, if we don't use the strobe light we cannot see the image that is on it because it is moving too quickly. This is why we will see circles of color on the wheel instead of the original image, same as how fan blades will become a blur while spinning. If something is moving fast enough, it can look to have a motion that we know isn't actually there, like how a car's tires might look like they are spinning backwards while driving.

We see this blur of motion because our eyes have a speed limit. ''Frame Rate'' refers to how many images (frames) something can take per second. Our eyes have a frame rate of about 60 frames per second, or fps, which is fast enough to catch the motion of most things we see. Current animated shows usually have 30-40 fps, and live-action shows will often use 50 fps. Live-action shows use enough frames so to give a natural look to the movement of the actors on-screen, but animated shows are slow enough that our eyes can catch the small "jumps" between frames. If an object is moving too quickly for our eyes to catch it, however, then our brains will try to find patterns in the movement. When a pattern is found, our brains will focus on it, which results in the illusions of movement we see.

By using the strobe light, we can manipulate the motion we "see". Every time the light flashes onto the wheel, the flash is interpreted as a single frame, which affects the frame rate that we are picking up. By having the light flash faster, we can find a point where every flash matches up with the same point on the wheel, making the image look frozen. We can even adjust how fast the wheel appears to move, making it into a dynamic image with spinning balls, rotating gears, or even pumping pistons! This type of aliasing is also known as ''Strobic Aliasing'', since it is induced by the use of a strobe light.

The ''Color Wheel'' is unique, for it shows the ways that the colors of light mix together. We know that the primary colors of pigments are red, blue, and yellow. We can mix these colors together to get all other colors, and by mixing them in equal amounts we can get black. However, we know that we cannot mix them together to make white. To get white, we have to remove these colors, because white is the absence of color for pigment.

{| class="wikitable" style="color:black; background-color:#ddd; margin-right: 24px; text-align:center; float:left"
|+ Color Mixing
|colspan="2"|'''Additive''' (Light)||colspan="2"|'''Subtractive''' (Paint)
|-
|''Primary Colors''|| Red, Blue, Green
|''Primary Colors''|| Red, Blue, Yellow
|-
|''Red + Blue''||Magenta
|''Red + Blue''||Purple
|-
|''Red + Green''||Yellow
|''Red + Yellow''||Orange
|-
|''Blue + Green''||Teal
|''Blue + Yellow''||Green
|-
|''Red + Blue + Green''||White
|''Red + Blue + Yellow''||Black
|}

The color wheel has red, blue, green, and white on it. This might seem odd at first, since green is not one of the primary colors for pigment. This is true, and we can tell that when the wheel starts spinning; When the wheel is spinning fast, we see a dark purple blur instead of black. This is because we are looking at pigments mixing, so we can identify the blue/red as purple, the blue/green as a dark teal color, and the green/red as a murky purple/brown color. These colors are blurring together, with them being slightly brighter due to the little bit of white on the wheel.

The strobe light makes a big difference, and when it is flashing fast enough we see some new colors show up on the wheel! The colors we see are because of the light from the strobe light bouncing off the wheel to our eyes, which results in the colors we see not blending on the ''wheel'', like before, but in our ''eyes''. Another thing about these new colors is that they are all lighter shades than the colors before them, which contrasts how we see pigment colors mix. This happens because of the difference in ways that light and pigment mix. 

Light is ''additive'', meaning that light can give out all the colors that are mixed into it. The additive property of light is why we use white lights to see. White light is a mix of all colors of light. This means that when white light hits a surface, there will always be at least one color of the light that reflects back, except black. The additive property of light is also why we cannot have a true "black" light. Black would indicate a lack of all colors of light, so a "black light" would just be darkness. Instead, the black lights we use are actually violet lights, which have a lot of energy to them and can cause other materials to glow in the dark!

Pigment is ''subtractive'', meaning that it will absorb all colors of light except for the one it reflects. This is why pigments become darker shades as you add more colors to them; The additional colors absorb some of the other colors already mixed in, so less light is being reflected as other colors are being added. This is also why we cannot get a perfect "white" paint. White means that there is no color being absorbed into the surface, so a perfect white paint would actually be a perfect mirror. The white pigments we use are shades of white, but they still are absorbing some color, which is why we see them clearly instead of seeing just a reflection!