Astronomers with the Event Horizon Telescope have developed a new way to observe the radio sky at multiple frequencies, and ...

The sky is always changing colors—from a bright blue on a clear day, to red and orange sunrises or sunsets, or multiple colors of a rainbow—there’s a lot going on that we don’t always think about.

The haze and smoke in the atmosphere Friday made for a very vibrant sunset and will likely lead to a vibrant sunrise Saturday ...

All three types of cones can absorb numerous ... The problem with purple is that it isn’t supposed to be possible to create a color from wavelengths on opposite ends of the spectrum.

Rather than trying to mix and match different wavelengths of light to produce color, their Oz system stimulates ... to stimulate thousands of cone cells all at once. And the researchers are ...

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 ...

The color white is a uniform mixture of all possible light wave frequencies ... Just as it is possible to filter white light into different wavelengths of colored light, it is also possible ...

has developed a novel stretchable photonic device that can control light wavelengths in all directions. This pioneering study was published in Light: Science & Applications on May 22. Structural ...