Energy & Green Tech

Using sodium to make more sustainable batteries

The element lithium is used widely in batteries because it results in long-lasting, stable energy storage. However, it's a finite resource, so researchers are hard at work trying to identify alternate materials to use in ...

Engineering

Creating 3D shapes from a flat surface using LEDs

A team of South Korean researchers has developed an innovative haptic (tactile) display technology that is attracting global attention. This innovation allows users to physically experience 3D shapes and various textures, ...

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Light

Light is electromagnetic radiation, particularly radiation of a wavelength that is visible to the human eye (about 400–700 nm, or perhaps 380–750 nm.) In physics, the term light sometimes refers to electromagnetic radiation of any wavelength, whether visible or not.

Three primary properties of light are:

Light, which exists in tiny "packets" called photons, exhibits properties of both waves and particles. This property is referred to as the wave–particle duality. The study of light, known as optics, is an important research area in modern physics.

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