Dwarf galaxy catches even smaller galaxy

Astronomers know that the Milky Way grew by taking in smaller galaxies. But now, a team of Italian-Dutch researchers has shown that a small galaxy neighboring the Milky Way has in turn absorbed an even smaller galaxy from ...

Tuning transparency and opacity

Making a dark human hair transparent, or even an opaque bar of silicon: this optical "sorcery" is possible by manipulating the incident light. This new phenomenon is called "mutual extinction and transparency." Until now ...

Colorblind fish reveal how vision evolved

After decades of studying color vision in mice, new research in zebrafish has allowed experts at the University of Tokyo to uncover how some animals regulate their ability to see blue light. The results, published in Science ...

Indian scientists explore galaxy cluster Abell 725

Using the Giant Metrewave Radio Telescope (GMRT), Indian astronomers have conducted radio observations of a galaxy cluster known as Abell 725. Results of this observational campaign deliver important information regarding ...

New proteins enable scientists to control cell activities

Sailan Shui, a doctoral assistant at EPFL's Laboratory of Protein Design and Immunoengineering, enjoys playing with proteins, activating and deactivating them as she wishes, as if light switches that can be turned on and ...

How the Sun's magnetic forces arrange gas particles

Solar prominences hover above the visible solar disk like giant clouds, held there by a supporting framework of magnetic forces, originating from layers deep within the Sun. The magnetic lines of force are moved by ever-present ...

page 1 from 40

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.

This text uses material from Wikipedia, licensed under CC BY-SA