Prism glasses bend and redirect light before it meets the eye. They may help improve double vision for people with an eye misalignment or condition. If an eye doctor suspects someone may benefit from ...

The net of a 3D shape is what a shape looks like when opened into a 2D shape. The net can help to show the areas of each face that make up the surface area of a shape. The same units are needed for ...

Newton’s experiment remains almost insultingly simple. Sunlight, a darkened room, a glass prism. The conclusion was unavoidable. Colour belonged to light itself. The prism merely made it visible.