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2. Light-emitting diode physics - Wikipedia

   en.wikipedia.org/wiki/Light-emitting_diode_physics

   A LED is a long-lived light source, but certain mechanisms can cause slow loss of efficiency of the device or sudden failure. The wavelength of the light emitted is a function of the band gap of the semiconductor material used; materials such as gallium arsenide , and others , with various trace doping elements , are used to produce different ...

3. Light-emitting diode - Wikipedia

   en.wikipedia.org/wiki/Light-emitting_diode

   One-color light is well suited for traffic lights and signals, exit signs, emergency vehicle lighting, ships' navigation lights, and LED-based Christmas lights Because of their long life, fast switching times, and visibility in broad daylight due to their high output and focus, LEDs have been used in automotive brake lights and turn signals.

4. LED lamp - Wikipedia

   en.wikipedia.org/wiki/LED_lamp

   A 230-volt LED filament lamp, with an E27 base. The filaments are visible as the eight yellow vertical lines. An assortment of LED lamps commercially available in 2010: floodlight fixtures (left), reading light (center), household lamps (center right and bottom), and low-power accent light (right) applications An 80W Chips on board (COB) LED module from an industrial light luminaire, thermally ...

5. Adaptive optics - Wikipedia

   en.wikipedia.org/wiki/Adaptive_optics

   Illustration of a (simplified) adaptive optics system. The light first hits a tip–tilt (TT) mirror and then a deformable mirror (DM) which corrects the wavefront. Part of the light is tapped off by a beamsplitter (BS) to the wavefront sensor and the control hardware which sends updated signals to the DM and TT mirrors.

6. 5 Items From the 1970s That Are Worth a Lot of Money - AOL

   www.aol.com/finance/5-items-1970s-worth-lot...

   Still, making a cool $6,000 for other vintage models isn’t so bad either for what you once considered junk in your garage. Consider This: 5 Side Hustles That Can Earn You an Extra $1,000 Before 2025

7. Biden visits Amazon rainforest en route to G20 summit in Rio

   www.aol.com/news/biden-visits-amazon-rainforest...

   Biden flew from Lima, Peru, to Manaus, Brazil, the largest city in the Amazon, to meet with local leaders working to preserve the rainforest. MANAUS, Brazil (Reuters) -Joe Biden became the first ...

8. Sugar Bowl preceded by moment of silence with empty seats in ...

   www.aol.com/sports/sugar-bowl-preceded-moment...

   Fewer fans appeared to attend the postponed Sugar Bowl between Notre Dame and Georgia on Thursday in light of the terror attack in New Orleans.

9. LED circuit - Wikipedia

   en.wikipedia.org/wiki/LED_circuit

   Simple LED (Light Emitting Diode) circuit diagram. In electronics, an LED circuit or LED driver is an electrical circuit used to power a light-emitting diode (LED). The circuit must provide sufficient current to light the LED at the required brightness, but must limit the current to prevent damaging the LED.