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Retinal Blind Spots

The lens of the eye bends light so that the light can enter the eye through the pupil. After entering the eye, light passes through the vitreous body – which most people think of as the eyeball. The r ...

Mach Bands

The goals of this project are: To demystify the cause of the appearance of an “aura.” To encourage critical thinking.It is an educational content by education.com.By clicking on the title of this reso ...

Seeing Different Images in Optical Illusions! Is It a Boy or Girl Thing?

Design and conduct an experiment to determine whether there are gender differences when boys and girls view optical illusions?It is an educational content by education.com.By clicking on the title of ...

The Candle Illusion: Virtual Images

Mirrors are strange things. They’re so common in our everyday lives that we often don’t think of how interesting they really are. Somehow they take the three-dimensional world we live in and represent ...

Apparent Movement of the Sun

Every day, the Sun rises in the east, rides across the sky, and sets in the west. Once upon a time, people thought gods like Apollo carried the Sun on a chariot. But as it turns out, the Sun doesn’t m ...

A Trick for the Eyes: Color Wheels and Optical Illusion Tops

The human eye is comprised of two types of receptors: rods and cones. Cones allow us to see color and work well in bright light. Rods are used to see in low light. When a color wheel or optical illusi ...

Hammer Ruler Trick

Ever seen something that looked impossible? In this science fair project, we’re going to investigate the physics of torque, balance, and the center of gravity using a “discrepant event”—something that ...

Optical Illusions

The eye and brain are both easily fooled. There are many kinds of optical illusions. Some involve color and/or contrast. Others use perceived shapes. Still more require the image to move to create the ...

From silver to silicon (Edu3.cat)

400 years ago, when Galileo Galilei wanted to show others what he saw through his telescope, he had to make drawings. The pockmarked face of the Moon....Ver más.

From silver to silicon es un contenido ...

Dragon Illusion, una ilusión óptica para ver y fabricar (grand-illusion.com)

Otra divertida ilusión óptica. Lee las explicaciones (en inglés). También puedes ver el vídeo o descargarte un recortable y montar este dragón que siempre te ...

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