Gray, or Grey, any color formed by blending black and white. Gray tones range from nearly white to nearly black. The many tiny dots of black and white in a halftone reproduction of a photograph produce gray tones.
Did anything vaguely scientific happen in the Middle Ages? Take this quiz to learn how we got through a dark period of history while trying to figure out how the sun was revolving around us, anyway.
Electronics, the branch of science and technology concerned with the nature, uses, and manufacture of devices in which electrons flow through a gas, vacuum, or semiconductor. Learn all about electronics.