However, in the Pashto language (an Iranian language), the word māt (مات) still exists, meaning "destroyed, broken". Others maintain that it means "the King is dead", as chess reached Europe via the Islamic world, and Arabic māta (مَاتَ) means "died" or "is dead". The term checkmate is, according to the Barnhart Etymological Dictionary, an alteration of the Persian phrase "shāh māt" (شاه مات) which means, literally, "the King is helpless". ExamplesĪ checkmate may occur in as few as two moves with all of the pieces still on the board (as in Fool's mate, in the opening phase of the game), in a middlegame position (as in the 1956 game called the Game of the Century between Donald Byrne and Bobby Fischer), or after many moves with as few as three pieces in an endgame position. A checkmating move is recorded in algebraic notation using the hash symbol (#) - for example, 34.Qh8#. If a player is not in check but has no legal move, then it is stalemate, and the game immediately ends in a draw. In master and serious amateur play, most players resign an inevitably lost game before being checkmated, and it is considered bad etiquette to continue playing in a completely hopeless position. In chess the king is never actually captured - the game ends as soon as the king is checkmated. Most of what we see from a black light is the effect it has by making things such as our shirts and teeth glow.Checkmate (often shortened to mate) is a game position in chess (and in other board games of the chaturanga family) in which a player's king is in check (threatened with capture) and there is no way to remove the threat. The light emitted by black lights is mostly UV, which is invisible to the human eye. Phosphors convert the energy from UV radiation in black lights into a small amount of light we can see.
What we see glowing under black lights are phosphors, which is any substance emitting visible light when responding to radiation. Black lights can also be used to authenticate artwork or test counterfeit bills. Restaurants and grocery stores use black lights for insect protection, and forensic scientists use them for crime scene analysis. However, they aren’t just for show, they have many functional uses as well.
We often see black lights in bowling alleys, amusement parks, clubs, for Halloween displays, and in other fun locations. If you’re looking for something to use on a smaller scale, CFL black lights are a convenient way to add some spooky vibes to your Halloween house party. We offer a variety of T8 and T12 tubes, U-shaped tubes, and CFL bulbs.īlack lights in various tube shapes are great solutions for places such as bowling alleys and amusement parks. There are even natural phosphors in our teeth and fingernails!īlack lights come in fluorescent, incandescent, mercury vapor and LED technologies.
CFL BLACKLIGHT TV
Some paints, posters, TV screens, and all glow-in-the-dark products glow in response to black light. Lighter articles of clothing, especially white colors, often glow under black lighting. However, the light emitted is bluer instead of purple.īlack lights respond to phosphors in the environment around them, making things containing phosphors glow. A true black light emits more visible light than a black light-blue bulb. The rest of what the bulb emits is ultraviolet light in UVA form, which makes fluorescent colors glow but is not seen by the human eye. A black light-blue bulb keeps almost all visible light inside the bulb so only a slight purple glow is emitted. There are two different kinds of black lights.
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