For many years, the lightbulb as we know it were the cheap incandescent light bulbs – you know the buy 4 for around $3. Then several years back, CFLs were introduced. These are the funny shaped bulbs that cost more money but promised to save you money. For a while they lit your hou...
aLater, Holonyak started looking into how semiconductors could be used to generate light. But while his colleagues were looking at how to generate invisible light, he wanted to generate visible light. The LEDs he invented in 1962 now last about 10 times longer than incandescent bulbs, and are...
What is the difference threshold for light? How bright is earthshine? What type of simple machine is a light bulb? What does incandescent mean? What is the light transmission of roentgenium? What are compact fluorescent light bulbs made of?
A hundred-watt incandescent light bulb doesn't slice up your retina, but a quarter-watt laser can burn a tattoo permanently into the back of your eye. "Coherent" can also mean "sharp when focused," since focused Coherent light must all converge to an infinitely small point. (Yeah yeah di...
Incandescent light bulbs Electroluminescent panels Among these, only electroluminescent panels are capable of providing uniform light across the entire surface. For other light sources, a diffuser needs to be used for providing uniform light. White backlighting is much more predominant than colored back...
Back in 2017, we shared a very extensive posts about light bulbs. One of my favorite subjects. It's been a very popular post that people ask for a link ...
Incandescent light bulbs aren't as power efficient it's true -- but who wants to live in a shockingly bright white cold house? I've always used incandescent bulbs to lower my heating bill and make my house look warm and cozy. Of course, the city has given me new light bulbs for my...
Incandescent light bulbs Packing peanuts (polystyrene foam) Dirty diapers Hangers Bubble wrap Batteries Rubber balls Tires Razor blades Wood Mirrors Ceramic items, like dishes Why Does Recycling Matter? Along with reducing the burden on U.S. waste disposal sites, recycling reduces the need to manufac...
Incandescent lights also produce some blue light, although less than most fluorescent light bulbs. You might not want to use warmer lights in your entire home, but consider putting them in your bed room or anywhere else you spend time before going to sleep. ...
Lighting has come a long way since Tom Edison lit his first incandescent bulb(白炽灯泡)in the 1880s.LED bulbs are popping up everywhere now,on planes,car headlights,in your phone.And engineers are exploring more ways to use...