Purple is a combination of wavelengths from opposite extremes of the spectrum, which technically deosn’t make any sense, but ...

Express reader Elizabeth DuFour recently contacted The Express regarding this old photo of her father, Billy Entz, which was ...

Skywatchers throughout the Northern Hemisphere are enjoying views of the newly discovered Comet SWAN.

Imagine seeing a colour so vivid, so unlike anything in nature, that your brain has no reference for it. That’s exactly what ...

Brighten up the shaded areas of your yard with shade-loving, flowering woodland plants. Here are some plants (with photographs) and the shade level they prefer.

When we “see” a combination of blue and red wavelengths ... that best absorb greenish wavelengths (and have greenish pigment), and 10% are S cones that best absorb bluish wavelengths (and ...

This cannot always be de-elded by the appearance ; for example, in the case of a dark blue, the question rises ... concentrated sulphuric acid changes it to bluish-green ; with nitric acid it ...