Nov 28, 2012

Ponzo Illusion

Have you ever wondered why the Moon looks bigger on the horizon? It is an illusion, known as the Ponzo Illusion. What is happening is actually something that your brain does all the time. The yellow lines are the same size, but the top one appears larger.

Think about what happens when you see one of your friends on the horizon. Although they appear to be very small, your brain doesn’t actually interpret them as being that tiny. This is what happens when we look at the moon. Your brain inflates the size of the Moon to make it appear larger than it really is. Next time you are looking at an over-sized moon, block everything else out with your hands and watch it appear to shrink.

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