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Blacklight. Blacklight fluorescent tubes. The violet glow of a blacklight is not the UV light itself, but visible light that escapes being filtered out by the filter material in the glass envelope. A blacklight, also called a UV-A light, Wood's lamp, or ultraviolet light, is a lamp that emits long-wave (UV-A) ultraviolet light and very little ...
A Black Hornet Nano helicopter unmanned aerial vehicle (UAV) (2013) The Black Hornet Nano is a military micro unmanned aerial vehicle (UAV) developed by Prox Dynamics AS of Norway, and in use by the armed forces of Norway, the United States, France, the United Kingdom, Germany, Denmark, Algeria, Ireland, Australia, the Netherlands, Poland, New Zealand, India, Turkey, South Africa, Ukraine and ...
Very small formfactor handheld measuring 1.2 by 0.7 by 0.3 inches (30.5 mm × 17.8 mm × 7.6 mm). Has a 0.38 by 0.27 inches (9.7 mm × 6.9 mm) black and white OLED display. Can be mounted on a keychain. Can play multiplayer games with a link cable. 2022 [92] Playdate
Some signal lamps are mounted on the mastheads of ships while some small hand-held versions are also used. Other more powerful versions are mounted on pedestals. These larger ones use a carbon arc lamp as their light source, with a diameter of 20 inches (510 mm). These can be used to signal to the horizon, even in conditions of bright sunlight.
A flashlight (US English) or electric torch (Commonwealth English), usually shortened to torch, is a portable hand-held electric lamp. Formerly, the light source typically was a miniature incandescent light bulb, but these have been displaced by light-emitting diodes (LEDs) since the early 2000s.
Mechanically powered flashlights were distributed by aid organizations to survivors of the 2010 Haiti earthquake since electric power was lost for a long period. A mechanically powered flashlight (UK: mechanically powered torch) is a flashlight that is powered by electricity generated by the muscle power of the user, so it does not need ...
Handheld electronic games are interactive electronic games, often miniaturized versions of video games, that are played on portable handheld devices, known as handheld game consoles, whose controls, display and speakers are all part of a single unit. Rather than a general-purpose screen made up of a grid of small pixels, they usually have ...
The flat bottom surfaces of the anvil and post embedded inside the epoxy act as anchors, to prevent the conductors from being forcefully pulled out via mechanical strain or vibration. A light-emitting diode (LED) is a semiconductor device that emits light when current flows through it. Electrons in the semiconductor recombine with electron ...
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