You see transparent objects because they bend light.

This giant balloon bends sound waves just as a lens bends light.

Your brain adapts quickly to a warped view of the world, turning baskets into air balls.

Lenses transmit an image of your face across space.

Play with beams of light.

Explainers do biology and botany demonstrations.

Explainers do light and sound demonstrations.

Sunlight–reflected and refracted–paints an ever-changing color composition.

Freezing water forms a spiky kaleidoscope of colorful crystals.