How can optical illusion make you see different things.?
600477
The most acute sight in the eye is in the area called the macula. In that area are the most cells which can show both color and detail. The cones and rods of the eyes contain photo-sensitive chemicals. The chemicals undergo very (very) fast reactions when they react to photons. Still they are chemicals which need constant variety to keep a balance.  When one color is constantly received, the chemical is not maintained in a normal balance. The cell's photo receptors which are NOT activated by the repetitive color recover faster and report a false image to the brain. the macula has enough receivers to keep up with the color signal when you follow the color around the circle. When you look at the center, the cells outside the macula are reporting and there are not enough of them to keep up with the color overload. They gradually run out of the photo chemical and stop reporting the signal. Their recovery rate is a little slower than the rate of the rotating color signal.\nI really enjoyed that demonstration of the workings of the eye! Thanks.
507845
They call it misdirection. What the mind sees thinks is real. When they show you one thing they are secretly doing something you wouldn't know what to look for on the side to get the awe inspiring effect. Only other magicians or people on the "know" can understand. Scientifically, the whole world would know if Chris Angel really levitated or he'd be locked in a jar for Military research and we would never see something like that for real.
448202
If you shine a white light through a prism, the light is refracted and you get a rainbow. Thats how you can see the different wavelengths in white light.
871539
Basically, Color, black and white are measured by the Cones and Rods in the back of you retinas.  And boy are there a lot of them.  But one eye might have a little more than the other eye  or there maybe more of them grouped in a certain location which may be the reason for the discreptancy.
415628
Use your wild imagination and what do you see?
32274
it's an optical illusion
831547
The color which you are seeing may look differently to other person.\nIt depends on how eyes recieve the color and how the brain interprets the signals.\n\nThis is very difficult to answer. if one can be made to work with more than one brains, then probably, it can be answered correctly!!!
20255
I had always believed that it was the effect of light passing through differing layers of the atmosphere, but on doing a quick search to check my hypothesis, I found an amazing site on "The Moon Illusion" that systematically goes through and discusses an amazing number of different theories (and systematically negates pretty much all of them). Early on in the information, it says, "We know that this phenomenon is not a physical or atmospheric effect..." So much for my assumption!\n\nAfter many pages of discussion, it ends with the following words: The final word has not yet been written on this subject.\n\nYou have to check out this site -- it's pretty amazing.
75320
This known as a mirage.  Very simply the hot air rising from the desert surface causes light (which travels in straight lines) to be defracted (this means that the line of travel changes when moving from cold air to hot air and vice versa)  This leads to two effects.\n\nFirst is a shimmering on the ground in the middle distance which resembles sunlight glistening in water.\n\nSecondly, objects that are in the far distance can be seen to be closer than they are.\n\nThese effects can be observed on road surfaces in the right conditions during hot summer weather.
313980
If you mean the illusion caused by the eye and brain when viewing many rapid individual frames making them appear as continuous motion when viewing television and film, yes.  \n\nAre you referring to subliminal suggestion within media?
30370
There are different colors of light that make up white light. Each color bends by a different amount when it enters a slow medium, like the glass of a prism or the water of a rain drop. Red bends the least, and violet bends the most. When the different colors bend from passing through a slow medium, they get separated, as in a rainbow. \n\nBy the way, if you see a rainbow from an airplane, it will not be an arc, but can be a complete circle. \n\nAlso, sometimes you can see a 2nd fainter rainbow next to the first, with the colors in the opposite order. \n\nIn the laboratory, it is possible to see a 3rd rainbow, fainter still, and even 4th, 5th,...and even 12th rainbows from a single drop of water, and as many as 19 rainbows from a stream of water! \n\nThere are also even more interesting "supernumerary" rainbows with other color orders that appear just under the main rainbow or sometimes the secondary rainbow, that you might have observed sometimes. Look at the pictures in the references I found.
564073
Because light travels at different speeds when travelling through different materials, the light seems to bend.
160214
They also occur as a circle, if you're in a plane (i was in a microlight) above mist/cloud it's the most spectacular sight, I looked down and there was a circular rainbow. It has to do with the fact that you're viewing it from one point, all the rainbow is relative to you.
669507
MATTER: THE OTHER NAME FOR ILLUSION\n\nIT IS A SCIENTIFIC FACT THAT THE WORLD COMES INTO EXISTENCE IN OUR BRAINS\n\nWe acknowledge that all the individual features of the world are experienced through our sense organs. The information that reaches us through those organs is converted into electrical signals, and the individual parts of our brain analyze and process these signals. After this interpreting process takes place inside our brain, we will, for example, see a book, taste a strawberry, smell a flower, feel the texture of a silk fabric or hear leaves shaking in the wind. \nWe have been taught that we are touching the cloth outside of our body, reading a book that is 30 cm (1 ft) away from us, smelling the trees that are far away from us, or hearing the shaking of the leaves that are far above us. However, this is all in our imagination. All of these things are happening within our brains. \nAt this point we encounter another surprising fact; that there are, in fact, no colors, voices or visions within our brain. All that can be found in our brains are electrical signals. This is not a philosophical speculation. This is simply a scientific description of the functions of our perceptions. In her book Mapping The Mind, Rita Carter explains the way we perceive the world as follows:\n\nEach one [of the sense organs] is intricately adapted to deal with its own type of stimulus: molecules, waves or vibrations. But the answer does not lie here, because despite their wonderful variety, each organ does essentially the same job: it translates its particular type of stimulus into electrical pulses. A pulse is a pulse is a pulse. It is not the colour red, or the first notes of Beethoven's Fifth—it is a bit of electrical energy. Indeed, rather than discriminating one type of sensory input from another, the sense organs actually make them more alike. \nAll sensory stimuli, then enter the brain in more or less undifferentiated form as a stream of electrical pulses created by neurons firing, domino-fashion, along a certain route. This is all that happens. There is no reverse transformer that at some stage turns this electrical activity back into light waves or molecules. What makes one stream into vision and another into smell depends, rather, on which neurons are stimulated.1 \n\nIn other words, all of our feelings and perceptions about the world (smells, visions, tastes etc.) are comprised of the same material, that is, electrical signals. Moreover, our brain is what makes these signals meaningful for us, and interprets these signals as senses of smell, taste, vision, sound or touch. It is a stunning fact that the brain, which is made of wet meat, can know which electrical signal should be interpreted as smell and which one as vision, and can convert the same material into different senses and feelings.
59683
Here is an excellent site about optical illusions:
287924
That's because light reflects in the mirror just as if it's coming from the same distance the real object is but behind the mirror.  You are nor looking an image that is at the mirror distance, but really at the real object distance.
915429
We only see the light reflected off of an object.  Google the invisibility cloak that scientists have comeup with.  It works by refracting and redirecting light .