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How does the incandescent light bulb work?
Current passes through the filament of the bulb causing it to heat up. When it heats up, it becomes so hot it incandesces. That means it radiates light. When the filament is white hot, it radiates light across much of the visible spectrum. Incandescent lights also waste a lot of energy which comes out as heat.
What is the metal of a light bulb made of?
The wire inside of an electrical light bulb is called a "filament". The word filament comes from the Latin word "filum" which means "thread". In various fields there are many different types of filaments with different uses, however the ones inside of light bulbs are made out of tungsten and work by super-heating by passing electricity through it.
What is the impact of the incandescent light bulb?
It enabled people to work longer hours
What causes a light bulb to turn black when they burn out?
As an incandescent light bulb is used, tungsten slowly evaporates from the filament causing it to get thinner. When it gets too thin it can no longer carry the current and part of it melts causing the bulb to blow out.
Why do they say to only use incandescent lights in security lights with motion sensors?
Incandescent light are the only type of light that has a filament. The filament is the the little piece of wire that glows where the electricity passes through it. All other lights are gas filled. Most motion detectors need to pass a small amount of electricity through the filament to work. The motion detector uses the filament as a neutral wire. The time lag to get a florescent bulb to light up would create too much delay and negate the use of the motion detector. The filament will light up very quickly.
How does a bulb work?
Answer 1A light bulb works by changing electrical energy provided to it into thermal energy, or heat. The filament in an incandescent lamp is heated to such a high temperature that it gives off a portion of the energy in visible light by the mechanism of incandescence. Answer 2 More ExplanationThere is a single filament of thin wire of Tungsten used in incandescent bulbs, so when it's heated by electrical current the air molecules around the filament warm. Electrons are excited to a higher orbit and they return to their original position via the emission of photons. The light emitted is what we call incandescence.
In what year did Thomas Edison invent the light bulb?
Edison did not invent the lightbulb. He purchased the 1875 patent he purchased from inventors, Henry Woodwardand Matthew Evans and improved on it. His contribution was to develop a carbon filament that burned for forty hours. Edison placed his filament in an oxygenless bulb.
In a light bulb what is energy transformed in to?
In typical light bulbs, or incandescent bulbs, the resistance to the current directed through the filament causes the filament to heat up, thus radiating light. The glass bulb around the filament is vacuum sealed to remove oxygen, which would rapidly oxidize and destroy the super heated, ultra thin filament. there are variations of this technology in which the bulb is not a vacuum, but is instead filled with different gasses surrounding the filament, which allows the filament to burn even hotter, creating more light. fluorescent bulbs work by creating a reaction between mercury vapor and phosphors. electric current excites the mercury atoms, which then release ultraviolet light. The ultraviolet light causes the phosphors to fluoresce, which creates light in our visible spectrum.
How did Edison's light bulb work?
Electricity goes through the "electrical foot contact", heats up the wires (connected to the tungsten filament) therefore lighting the light bulb up. The filament is supported by wires. The glass mount holds up the two wires connected to the filament. That is how I think the light bulb works. Have a look.
How a light bulb works?
The filament in the bulb (the thin tungsten wire inside) is heated with electricity and then it lights up. That is how incandescent bulbs work. (the old kind) CFL's (Compact Fluorescent Lights) work by a gas (possibly argon) is electrically charged and then the atoms give off light.
When did thomas edision invented the light bulb?
October 22, 1879. However, Edison did not invent the light bulb, it is a matter of documented record that Swan obtained a UK patent covering a partial vacuum, carbon filament incandescent lamp in 1860. Thomas Alva Edison patented his invention in 1879, almost 20 years later, the same year that Swan's bulbs were in domestic use in England.
What is the function of the Tungsten filament in a light bulb?
Because it has a very very high melting temperature: 6191F, 3422C. However it is also very difficult to work with, so early light bulbs used carbon for making the filament instead. Around the year 1900, carbon filaments were replaced with tantalum filaments. It was not until about 1910 that it became practical to make tungsten filaments.
