Fringes of color at the edges of objects in a photograph due to the inability of the camera lens to deal with all wavelengths of light equally. High-quality lenses that use multiple elements generally ...

Light travels at different speeds based on the medium it passes through. For example, in a vacuum, it travels at 3.0 × 10^8 m/s in a straight line. But when directed towards glass, air, diamond, water ...

Images of the smallest cone photoreceptors in the retina, with colour added to represent the different wavelengths of light used to capture the images after compensating chromatic aberration.

Not an aberration: schematic drawing of the metalens (left), which is made of tiny titanium waveguides. The drawing on the right is of a single waveguide. (Courtesy Boubacar Kanté) A new type of ...

Charles Arthur Birch-Field, who is no crackpot, last month advertised that from ordinary black & white pictures on photographic film he could get the colors of the original scenes. Greying, Ohio-born ...