Subject: Perception

Is pure water colorless?

A flash of light leaves a lingering image.

A cube made from drinking straws can confuse your brain.

Without depth perception, random lines can become a chair!

Learn how to fly with this neat mirror trick.

Make yogurt from yogurt.

A rotating black-and-white disk produces the illusion of color.

Stare at one color—but see another.

To see or not to see.

Discover why the sky is blue and the sunset is red.

Give a light source the raspberry and watch it wiggle.

Turn an old CD into a spectroscope to analyze light.

Pages