Essay PreviewMore ↓
Early man knew the sun as his lightsource and when the sun set, he knew the moon and the stars. As his intelligence increased and he learned about the world in which he lived he became associated with fire. Fire could be used for warmth, cooking, protection, and light. Man lived with this for years, elaborating and improving the way the fire was created and burned for light, until the year of 1809 when one man, an English chemist by the name of Humphrey Davy began the search for a usable incandescent light source using electricity. Using a high powered battery to induce a current between two high powered strips he produced an intense incandescent light, which became known as the first arc lamp.
Although it was a first step it was not yet a practical light source. The first known attempt to make a actual bulb didn't come until 1920 when Warren De la Rue enclosed a coil of platinum wire in an evacuated tube and passed an electrical current through it. Although a platinum light bulb was not practical the idea behind his design was. A metal with a high melting point to achieve high temperature and thus bright light, as well as an evacuated tube that contained less particles to react with the metal and thus an elongated bulb life.
Throughout the next few decades scientists labored to create their "efficient" light bulb. Their main hurdle was finding a low cost, long lived, high temperature filament material that would glow with high intensity.
In 1879 two scientist, Joseph Wilson Swan and Thomas A Edison, had independent breakthroughs for a longer lasting incandecent bulb with their use of a carbon fiber filament derived from cotton. It lasted a maximum of 13.5 hours. In 1880 Edison also developed a filament derived from bamboo which lasted up to 1200 hours. This was good, but to create a truly efficient bulb something different was need to creae a filament with very high temperatures but without degeneration and loss of heat.
Many elements were experimented with, a few of the most popular which were carbon, osmium, and tantalum.
How to Cite this Page
"Physics of Incandescent Light bulbs." 123HelpMe.com. 20 Nov 2019
Need Writing Help?
Get feedback on grammar, clarity, concision and logic instantly.Check your paper »
- Completed Work Task 1: Compare compact fluorescent light bulbs to incandescent light bulbs. In order to begin our research, we first had to prove that our current light bulbs are not the cheapest and not the most efficient choice to light up our buildings. Otherwise, it would have been useless for us to continue. We began our research using government documents, electronic books, and websites that compare incandescent light bulbs to other types of light bulbs. Ballast describes incandescent lamps as sealed bulbs which contain a filament and Argon gas.... [tags: Incandescent light bulb, Fluorescent lamp]
1197 words (3.4 pages)
- The Big LED Change Over “You’ll never buy another light bulb again” they said. “You’ll create less demand for fossil-fuel-generated power” they said. “You’ll save thousands of dollars” they said. A few years ago we found ourselves standing in the light bulb aisle at our local big-box hardware store, feeling dumbfounded and paralyzed by the overwhelming range of options. Walking up and down the aisle for half an hour or more, reading packages and comparing prices, color temperature, lumens, watts, hours of life, etc., we find ourselves parked in front of this array of options for simply lighting one’s home.... [tags: Incandescent light bulb, Fluorescent lamp]
1169 words (3.3 pages)
- We have come a long way from where we are now and when we started. During the beginning of time, we did not have cars, stoves, or even cellphones. Now thanks to several different inventions and discoveries we hold the opportunity to use many things that can help us with our daily tasks. Electricity is one of the major inventions that helps with operating all the electrical base appliances we use on a daily basis. Almost half of the electricity used by industry is for lighting. Most of the light is produced by incandescent light bulbs.... [tags: Incandescent light bulb, Thomas Edison]
1238 words (3.5 pages)
- Light Bulbs: Illuminating the Difficulties of Attempts at Environmental Protection Modern conveniences have come a long way in the last few centuries; mankind has invented everything from steam locomotives to computers and the internet, but no creation has been quite so monumental as the light bulb. As recently as the mid-1800s, people still relied on inconveniences like candles and oil lamps for light, and as technology advanced, scientists and engineers recognized that it was time for a change; after his great success with the phonograph, Thomas Edison was eager to rise to this new challenge, beating out his competition to patent the first incandescent bulb in 1879.... [tags: Incandescent light bulb, Fluorescent lamp]
1238 words (3.5 pages)
- While incandescent light bulbs are not as energy efficient when compared to newer alternative halogen light bulbs, compact florescent lamps (CFL), and light emitting diodes (LED), incandescent light bulbs should not be phased out due solely to their inefficiency. Phasing out incandescent light bulbs will not greatly reduce the level of mercury in the environment; additionally incandescent factories are now closed in the United States due to the phase out, many people in the lighting manufacturing industry have lost their jobs.... [tags: environmental issues and hazards]
941 words (2.7 pages)
- According to Cnet.com,” When congress passed the Energy Independence and security Act of 2007 (EISA). The incandescent bulb’s days officially became numbered. The law mandated strict new energy standards for lighting designed to kick-start a new era of greener, longer-lasting,more cost-efficient light bulbs and this meant kicking outdated, inefficient bulbs to the curb”(Crist). Led is the replacement for incandescent light bulbs. LED lighting is the future now. They are also long lasting, it saves you money and does not pull lots of energy.... [tags: energy efficiency]
1330 words (3.8 pages)
- The government should phase out incandescent lighting due to the advantages of the new alternatives. At this time, compact fluorescent lights (CFLs) are the central focus of this change and will be used as the example. First, CFLs on the market have better lighting quality than in previous years compared to incandescent bulbs. While quality is not the primary focus of the change, it signals a higher development and readiness for application to the greater public. Popular Mechanics, back in May 2007, designed a study comparing an incandescent light to seven different CFLs.... [tags: environment, alternative energy, lighting]
1737 words (5 pages)
- LED Light Bulbs | Electrician Huntsville, AL While it is true the incandescent light bulb brought light to a dark world, it lacks the efficiency required today. With energy production increasingly expensive, light bulbs need to be more energy efficient and longer lasting. LED light bulbs provide today’s need for energy efficiency and a long service life. While the LED light bulb is relatively new, it is an extremely efficient means of lighting. However, LED technology is still under development, and selection can be difficult for the many people.... [tags: Incandescent light bulb, Compact fluorescent lamp]
1052 words (3 pages)
- Should all Incandescent Lights be replaced by Compact Fluorescent Lights. INTRODUCTION: Incandescent lighting has been used for vast period of time dating back to the early Eighteenth century (MDH, 2012). With an increase in technology and more demands from the modern-lifestyle, a switch to Compact Fluorescent Lights (CFL) is gradually taking place. There were some reserves about the phasing out of incandescent lights especially over initial economic costs, yet the introduction of CFL is welcomed by many for its environmental superiority over the traditional incandescent bulbs (Dolland, 2012).... [tags: Incandescent light bulb, Fluorescent lamp]
1438 words (4.1 pages)
- Compact Fluorescent Light Bulbs Many of you probably did not realize that you could spend twenty dollars for a light bulb, and most of you are wondering why you would. The answer will surprise you: to save money. Before you decide that I have completely lost my mind, hear me out. The light bulb that I am referring to is a compact fluorescent light bulb, commonly called a CF. This is a self‑contained fluorescent light that fits into standard 120‑volt light fixtures. When compared with incandescent bulbs, CFs use only 25 to 30 percent of the energy and will last up to ten times longer.... [tags: CF Electricity Light Bulb Essays]
2176 words (6.2 pages)
Later, such inert gasses as nitrogen and argon were added inside bulb to decrease tungsten sublimation. Although this reduced sublimation and increasing bulb life, the inert gas also carried heat away from the filament, decreasing temperature and brightness. It was found that winding the tungsten filament into a finely wound coil reduced heat loss, thus allowing the bulb to operate as desired and giving us our modern day incandescent light bulb.
The structure of a lightbulb is very simple, considering the trouble it gave scientist for so many years, and really has not changed much at all from the basic structure of bulb with which they worked.
The structure begins with a glass bulb filled with an inert gas. At the bottom of this bulb are two metal electrical contacts each of which is connected to its own stiff metal wire. These metal wires extend into the glass bulb and are each connected to an end of a tungsten metal coiled filament that is supported within the bulb by a glass support that raises up through the center.
When an electric current is passed into the bulb the current flows from the negative contact, through the tungsten filament, to the positive contact. This electric current that moves through the solid metal conducting components of the bulb are simply the "mass movement" of free electrons from the negative charge to the positive charge.
As these free electron move through the filament at high speeds they are constantly bumping into the atoms that make up the filament, the impact energy vibrating and heating these atoms. Bounded electrons in the atoms of the filament are temporarily boosted to a higher energy level. When the electron returns to its original energy level they release the extra energy in the form of photons. Metal atoms release primarily infrared light photons which happen to be invisible to the human eye, but if heated to a high enough temperature (around 2,200 C) will emit the visible light seen from a bulb.
Light is simply a form of energy (or electromagnetic radiation) made up of many small particle-like packets, with enery and momentum but no mass, that can be released by an atom. These particles are the basic components of light and are known as light photons.
Electrons orbiting the nucleus within atoms are said to be at various "energy levels". This energy level depends on many things such as speed and distance from nucleus. As well, electrons of different energy levels are said to be in different orbitals around the atom's nucleus.When electrons become excited their energy level increases and they move to a higher level orbital. Generally the higher the energy level, the higher the orbital, and the further away the electron moves from the nucleus. When energy is passed into an atom the electrons may become temporarily excited and move to a higher orbital. This excited position is held for only a small fraction of a second until it is drawn back by the nucleus and returns to its original energy level. When it does this it has to release its extra energy, which it does in the form of a photon, and in some cases a light photon.
The wavelength of the light emmited depends on the amount of energy released by the electron, and thus the type of atom as well. The wavelength of the light determines the color of light we see.
The spectrum of electromagnetic energy is very large, ranging from gamma rays up to AM radio waves. The type of wave depends on its wavelength, with gamma rays as low as 10e-14 meters to AM waves with a wavelength up to 100,000 meters.
The visible part of the electromagnetic sprectrum is very small and ranges between wavelengths of 400 to just over 700 nanometers.