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Solution:

This illusion works on our size perception. You will be surprised to know that both the orange circles are exactly same in the sizes. But you might think that the right one is bigger right? Why? This is because we are perceiving the sizes in relation with the surrounding circles. Since the left ones are larger, we perceive that the inner orange circle is smaller than the right one.

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This illusion is the proof of how smart our brain is. In the first figure, the three circles are cut and placed in a manner that we can easily trace a triangle on the top of them even though it is not there. Similarly in the second figure, we can make out a sphere on which the spikes are grown. It's awesome right?

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This is one of the most popular illusion that became a hype all over Facebook, WhatsApp and other social media sites and messengers. It is an interesting illusion. While some join it with faith, it is merely an illusion that works on a principle. If you carefully try to find out the reason, you can at least come across one explanation i.e. our mind projects the white part as the visible one and the black part as the invisible one when we stare at the wall.

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