Scientifically speaking, white and black are not considered colors. I know you can see black and white, but how light works may make you think differently about them as colors. First, let's talk about ...

How can we measure visible light? The electromagnetic spectrum includes all forms of light energy, known as electromagnetic radiation. (1) Different types of electromagnetic radiation such as radio ...

Researchers have built a paper-thin chip that converts infrared light into visible light and directs it precisely, all without mechanical motion. The design overcomes a long-standing efficiency-versus ...

Ultraviolet and near-infrared light are widely used in modern technologies but are invisible to the human eye. Researchers ...

Most light-field sensors — devices that detect the angles of incoming light rays to reconstruct 3D scenes — can detect light only in the ultraviolet and visible wavelength ranges. A newly developed ...

Researchers have created visible lasers of very pure colors from near-ultraviolet to near-infrared that fit on a fingertip. The colors of the lasers can be precisely tuned and extremely fast -- up to ...

Metasurfaces in which nonlocal light-matter interactions take place are a potentially useful variant of traditional ...

The invention of tiny devices capable of precisely controlling the direction and behavior of light is essential to the ...

The human eye perceives color using three types of cones, but no natural light can stimulate just the the cones associated with medium-wavelength light in the visible spectrum. A new tool, nicknamed ...

“Visible light is much gentler and can penetrate deeper, making it more suitable for real-world applications,” says Huaping Xu, a professor at Tsinghua University and one of the study’s corresponding ...