Grayscale refers to the range of shades of gray that can be represented in an image. The term is also sometimes used to refer to black-and-white images, although strictly speaking, black and white are not shades of gray. Grayscale images are typically stored using 8 bits per pixel, which gives a range of 256 different … Read more
A “Web year” is a unit of time equal to 365.24 days, or approximately 31556952 seconds. It is used to measure the rate of change of various web-based phenomena, such as the growth of the World Wide Web, the adoption of new web technologies, and the like. Who invented the Web? The World Wide Web … Read more
The Heisenberg uncertainty principle is a fundamental limit on the accuracy with which certain pairs of physical properties of a particle, such as position and momentum, can be known. It states that the more accurately one property is known, the less accurately the other can be known. This principle is not about the limitations of … Read more
A black hole is a region of spacetime where gravitational forces are so strong that nothing—not even light—can escape from it. The term “black hole” refers to the fact that even light cannot escape from these incredibly dense regions of space. Astronomers have seen black holes of different sizes. The smallest black holes are about … Read more
In physics, a unified field theory (UFT) is a type of field theory that allows all known physical forces and fundamental interactions to be written in terms of a single field. A field is a physical quantity that has a value for each point in space and time. A unified field theory is a theory … Read more
A metacharacter is a character that has a special meaning in a regular expression. For example, the metacharacter “.” matches any character, so the regular expression “.+” would match any string of characters. What metacharacter means? The term “metacharacter” refers to a character that has a special meaning in a particular context. In general, a … Read more
Superstring theory is a theory that attempts to explain everything in the universe in terms of one fundamental principle: strings. Strings are tiny particles that vibrate at different frequencies, and each different frequency corresponds to a different particle. For example, the frequency of a string might correspond to a photon, or to a quark, or … Read more
A zoetrope is a device that creates the illusion of motion by displaying a series of static images in quick succession. The images are usually drawn on a strip of paper or cardboard and placed inside a cylinder with slits cut into the sides. As the cylinder is turned, the viewer looks through the slits … Read more
A laser diode is a semiconductor device that emits laser light when an electric current is passed through it. Laser diodes are used in a wide variety of applications, including CD and DVD players, laser pointers, and fiber optic communications. What type of laser is a diode laser? A diode laser is a type of … Read more
