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Light Bulbs and Artificial Lighting
Artificial lighting has become standard in the homes and companies of most countries. It is used for concert effects, growing food, and reading a book in bed at night.
2,482 Questions
What are the dual properties of light?
Light exhibits both wave-like and particle-like properties, known as the wave-particle duality. This means light can behave as a wave with characteristics such as interference and diffraction, as well as a particle with discrete energy packets called photons. These dual properties are fundamental to the field of quantum mechanics.
The school locker room typically requires the highest illuminance among the locations listed. This is because it is important for safety and security reasons to ensure good lighting in locker rooms to prevent accidents and provide clear visibility.
Yes, argon is commonly used in incandescent and fluorescent light bulbs as a filling gas to protect the filament or electrodes from oxidation. Argon is an inert gas that helps prolong the lifespan of the bulb by reducing the rate of filament degradation.
Is there a such thing as a fluorescent spot bulb?
Yes. There are several different makes of Compact Fluorescent Reflector Spot Lamp (CFRSL) available. Some makes of CFRSL have a longer overall length than the equivalent conventional incandescent spot lamps so they don't look right in older types of conventional reflector spot lamp fitting. (They look better in the latest up-to-date fittings.) In Europe Megaman and SwissLight are two examples of the makes available. GE of USA makes them too. Megaman and SwissLight each make a Type R80 CFRSL which is so similar in size to the conventional incandescent R80 spot lamp that they look great in the older type of conventional reflector spot lamp fitting. I use five such Megaman Type R80 CFRSLs for 240 Volts AC in my kitchen here in England. Each lamp takes only 15 Watts power but gives the same light output as a 75 Watts standard R80 incandescent reflector lamp. (Type R80 is a Reflector lamp that is 80 mm maximum diameter, with a Regular size Edison screw.)
How can you demonstrate that a light bulb emits electrons by thermionic emission?
Edison was said to have noted this emission when a wire paralleling a light bulb filament showed current flow if the filament was more negaive than the wire, but not if the filament was more positive than the wire. Note that the wire is not touching the filament. The wire was inside the bulb with the filament. First Edison lit the bulb with a simple battery circuit. Then the wire was connected to a current meter and other terminal of the current meter to a second battery and the other end of the second battery to either end of the first battery. Depending on which way the second battery is set, the ammeter indicates an electric current flowing through the wire or not.
Why was the light bulb created?
The light bulb was created to provide a source of artificial light that could be easily controlled and used at any time of day or night, replacing more primitive sources of light like candles or oil lamps. It revolutionized the way we illuminate our homes and workplaces, increasing productivity and quality of life.
What gas is used in some light bulbs?
In some light bulbs, the gas used is argon or krypton. These gases help to prolong the life of the filament by reducing its evaporation.
No, Xenon bulbs are not compatible with standard halogen fixtures. It is important to use the correct type of bulb designed for the specific fixture to ensure proper functionality and safety. If the Low voltage under shelf track lighting halogen kit is no longer made, it may be difficult to find exact replacement parts, and you may need to consider upgrading to a new lighting system.
Yes, argon is commonly used in incandescent light bulbs. It is often used to fill the space around the filament inside the bulb, helping to prevent oxidation and prolong the life of the filament.
What gases are used in light bulbs?
Ordinary incandescent light bulbs are filled with an inert (electrically non-conducting) gas such as Nitrogen.
Other types are filled with a gas containing low pressure mercury vapor and argon, xenon, neon or krypton.
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Why do your house light bulbs burn out fast?
House light bulbs may burn our fast due to a few reasons, such as using bulbs with higher wattage than the fixture is designed for, poor ventilation around the bulb causing it to overheat, frequent on/off cycling reducing its lifespan, or poor quality bulbs. Make sure to use the correct wattage, ensure proper ventilation, and invest in higher-quality bulbs to help them last longer.
Why would a dimmer switch buzz with a compact fluorescent bulb?
Most compact fluorescent lamps won't work with conventional dimmers, or will damage the dimmer.
Magnetic dimmers will work, however. Answer
Actually, it depends on the design of the lamp. Different companies have different power supplies for the lamps. What works well on one can spell instant death for another. Get a dimmable lamp. The new LED lamps have the same problem. Some work fine with a dimmer, provided one incandescent lamp is left in the fixture. Others go crazy.
What would happen if you use a 300W regular light bulb in a table lamp that says 100W maximum?
<><><> If you are lucky, it may last long enough for you to get it turned back off, or pull the plug out of the socket. ALL electrical devices are designed to safely carry only a specified amount of current [Amps]. When you install a 300 watt bulb in a fixture designed to handle only 100 watts, you are OVERLOADING the SWITCH AND SOCKET by three times [that's 300% !!!!!], which is a very foolish thing to do. In this case, when you turn the switch on, several things will happen, either right away, or over a short time [a minute, maybe 5]: 1. Upon closing the switch [turning the lamp on], an electrical ARC could instantly occur, spitting a ball of fire and hot, molten metal droplets all over your hand, possibly into your face and eyes. The reason for this answer is that the switch contacts, if corroded, dirty, are misaligned and do not make full proper contact, or in any manner are defective or compromised, could soften and deform, or melt, and open enough to allow an arc to form. Though this occurance is not a high probability, it certainly has occured, has been documented, and therefore, this answer is NOT ridiculous. 2. If it doesn't "blow up" in your face, then within a few minutes, the lamp socket and switch will seriously overheat [at 300% overload] and possibly catch something below it, or nearby on fire, and then could arc and explode. An arc IS one form of explosion, and regardless of how big or small, can expell dangerous particles for significant distances. 3. Smaller "overlamping" [say a 100 watt bulb in a 60 watt fixture] of a fixture, EVEN if it doesn't blow, will over a short period of time will "cook" the socket and switch, resulting in premature wear out and failure, which could result in arcing and/or fire. For your safety, NEVER place more electrical load on ANY device than the manufacturer's specifications indicate. <><><>
That is among the most ridiculous alarmist responses I have seen to a silly question.
The heat from the excessive lamp will of course damage the socket and cause premature failure, but why would it arc and explode?
And why would you use a rope rated to hold 100 pounds to hold 300 pounds?
Wouldn't you expect it to break? <><><>
Can the new bright white LED lights be used on a circuit with a standard TRIAC-type dimmer switch?
If they do not have a ballast, then yes. If you can see the wiring look for components other that resistors. If you see caps, chips, inductors, or diodes you cannot dim it. I cannot offer more without more details on the lamp. Consult the packaging.
Why does replacing incandescent light bulbs with compact fluorescent bulbs conserve electricity?
Because instead of using a 40, 60, 75 or 100 watt bulb, you can get the same amount of light with using less electricity to run a fluorescent bulb. For example, if you are looking for the equivalent light output of a standard 100w incandescent, look for a 25w cfl (compact fluorescent light)
Another basic way to understand this is that incandescent bulbs produce a lot of heat along with the light they emit. They produce much more heat than the compact fluorescent bulbs. The heat from incandescent bulbs doesn't just come from thin air; it is a product of the electricity that is consumed by the bulb. This heat is called 'entropy' because it is wasted energy; it represents expended energy that can never be recaptured to do other things. The compact bulbs produce less entropy or wasted heat, and are therefore more efficient and environment friendly. If you are imagining that the heat from incandescent bulbs could very well be 'captured' and used for other things, realize that the 'capturing' process must itself involve the expenditure of energy, and at every step there is a huge loss of efficiency. Heat can be collected, but never without a cost; that cost is entropy.
Why were light bulbs invented?
They were invented to help people see things in the dark.
Another answer:
Light bulbs were part of the continuing improvement of lighting systems. At first people had to rely on the sun. When they build buildings the only light came in through the windows and doors. Fires in the buildings then gave some light. Smaller brighter fires like candles or torches improved this. Kerosene lights were even better, Then came electric lights - no smoke or smell and they weren't a fire hazard! Fluorescent bulbs gave more light for the same power. Now LED lights are even more efficient.
What is wrong with an electrical circuit that pops the 15A breaker each time a light bulb fails?
Circuit breakers can often trip when a light bulb fails just at the point when you switch on the light. The reason it happens is that, in normal use, the bulb's filament gets thinner and thinner and more and more brittle over time.
Eventually it is about to fail - also known as "burn out" - but it doesn't usually do it whilst it is still burning because it's resistance is at its highest when it is hot and "lit", so it is taking the least amount of current whilst it is "on".
But then, if you switch that bulb off as normal, when you next come to switch it on its filament will be cold and its resistance will be lower than when it was hot. At the point of switching it on it draws a higher starting current for the last time but then, as the filament finally "snaps", the "flying ends" of the snapped filament can sometimes momentarily short-out the hot and neutral filament feed wires, taking a very high current which trips the circuit breaker!
Any incandescent light bulb will draw a higher starting current when you first switch it on because, when cold, the filament resistance is at its lowest point. The bulb soon heats up to its normal running temperature at which point the current settles to its normal running current which is lower than its cold starting current.
But in the case of a bulb that has been used for near to - or more than - its designed number of hours, then it is much more likely to fail in a way that causes the circuit breaker to trip, as has been described above.
Provided they have not been "knocked or dropped" at some time during their life - which would significantly shorten their actual expected "life" because of mechanical damage to the filament - ordinary incandescent bulbs are rated for only about 1000 hours of actual use. More expensive "long-life bulbs are available that are rated at 2000 hours.
A different answer
If your home is new and has the new type of arc-fault breakers, this occurs from time to time when the filament in the bulb blows because the failing bulb causes an arc and the breaker does what it was designed to do: stop the arc.
Which lighting is better for reading Warm White White or Cool White?
Cool White lighting is better for reading as it provides better visibility and helps reduce eye strain. Warm White lighting tends to create a more relaxed and cozy atmosphere, which may not be as conducive for reading for extended periods.
Filament for kids is a safe and child-friendly 3D printing material made specifically for children to create various creative projects. It is non-toxic, easy to handle, and comes in vivid colors, making it ideal for educational and fun activities.
It sounds like you may be referring to the book "Chariots of the Gods" by Erich von Däniken. The book explores theories about ancient civilizations having contact with extraterrestrial beings based on various archaeological findings and historical mysteries, such as hieroglyphics depicting what some interpret as technology like light bulbs. It also delves into the Bermuda Triangle and the concept of unidentified flying objects (UFOs).
Lest too light winning make the prize light?
This phrase means that achieving success too easily or quickly may make the value or satisfaction of the prize diminish. It suggests that struggles and challenges faced during the journey to success are important in appreciating the reward. It emphasizes the importance of hard work and perseverance in earning a meaningful and valued victory.
What would b the effect on the circuit should the starter be taken out after the lamp is started?
Once started the fluorescent tube no longer needs the starter. In fact starters are designed to electrically "remove" themselves from the circuit when the fluorescent tube is conducting.
How do you change a light bulb in a ceiling fan?
Most ceiling fans have exposed light bulbs that area easily removed by turning the cool bulb counterclockwise.
The replacement bulb for a ceiling fan has a standard base, but the globe is a bit smaller than standard. These smaller bulbs are often stocked with the ceiling fans at your local appliance department or appliance store.
Be sure to get the same wattage replacement bulb.
Installing the bulb is just like any other lamp bulb. Screw in clockwise.
