Fire rainbows, a phenomenon that captivates both the eye and the imagination, are a rare sight in the sky. When these ...

The change in direction of a beam of light as it travels from one material to another is called refraction. The normal is a construction line drawn at right angles to the surface of the glass block.

When a wave or light ray moves from one medium to another its speed changes. The direction of the ray may also change. This property of waves is called refraction and commonly occurs with light rays.

Besides refraction and reflection, light can have its path changed through ... focus with diffracting concentric ridges, but the color output is highly distorted. Ordinary lenses refract different ...