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Photoresistor. A photoresistor (also known as a light-dependent resistor, LDR, or photo-conductive cell) is a passive component that decreases in resistance as a result of increasing luminosity (light) on its sensitive surface, in other words, it exhibits photoconductivity. A photoresistor can be used in light-sensitive detector circuits and ...
Light-emitting diodes (LEDs) produce light (or infrared radiation) by the recombination of electrons and electron holes in a semiconductor, a process called "electroluminescence". The wavelength of the light produced depends on the energy band gap of the semiconductors used. Since these materials have a high index of refraction, [note 1] design ...
"Turn Off the Light" is a song by Canadian singer-songwriter Nelly Furtado from her debut studio album, Whoa, Nelly! (2000). Written by Furtado, and produced by Gerald Eaton, Brian West, and Furtado, the song was released as the album's second single on 2 July 2001, reaching number one in New Zealand, Portugal, and Romania, as well peaking within the top 10 in several other countries ...
"Turn Off the Lights" was a hit for R&B crooner Teddy Pendergrass, released as a single on June 23, 1979. Released from his hit album, Teddy, the song hit No. 48 on the Pop charts and No. 2 on the R&B charts. The song was also a b-side single with "If You Know Like I Know."
Electric charge is a conserved property: the net charge of an isolated system, the quantity of positive charge minus the amount of negative charge, cannot change. Electric charge is carried by subatomic particles. In ordinary matter, negative charge is carried by electrons, and positive charge is carried by the protons in the nuclei of atoms.
Color temperature is a parameter describing the color of a visible light source by comparing it to the color of light emitted by an idealized opaque, non-reflective body. The temperature of the ideal emitter that matches the color most closely is defined as the color temperature of the original visible light source.
Hooks are useful inside the home and, as it turns out, inside the car, too. These headrest hooks can be used to hold your kids' backpacks, grocery bags, purse and other essentials off the floor ...
A high pressure sodium street light fixture. Street light interference, sometimes called high voltage syndrome, is the claimed ability of individuals to turn street lights or outside building security lights on or off when passing near them. [1] Believers in street light interference (SLI) allege that they experience it on a regular basis with ...