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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

Is candlelight artificial light?

Candlelight is man-made, so is artificial. Sunlight is natural light from the Sun.

What are 2 uses of a light bulb?

To cast a light so that we can see in the dark. To warm an incubator used to hatch chicken eggs, or keep sick animals warm.

What two energy changes happen in a light bulb?

In a light bulb, electrical energy is converted into radiant energy (light) and thermal energy (heat). When the bulb is turned on, the electrical energy flowing through the filament heats it up, causing it to emit light while also generating heat as a byproduct.

What does the filament of a light bulb do and what is it made from?

The filament of a light bulb is the part that produces light when an electric current passes through it. It is typically made from tungsten due to its high melting point and ability to withstand the heat generated.

How does a change in the size of the current through a bulb affect it's light output?

An increase in the current through a bulb will increase its light output because more current means more electrons passing through the filament, which generates more heat and light. Conversely, a decrease in current will result in lower light output as there are fewer electrons flowing through the filament to produce light.

Why would you always use a rubber bulb when pipetting?

Using a rubber bulb when pipetting is essential for ensuring precision and control over the liquid being transferred. The bulb allows for easy suction and release, minimizing the risk of contamination and providing a more consistent flow of liquid. Additionally, it helps prevent the accidental aspiration of liquid into the mouth, promoting safe laboratory practices. Overall, it enhances both accuracy and safety during pipetting tasks.

How bright is 400 lumens?

This is a bit less light than a 40W incandescent bulb (much less than a 9-watt CFL bulb, but twice as much as a 5-watt CFL mini-bulb).

What can you use an orange colored light bulb for?

An orange-colored light bulb can be used to create a warm and inviting atmosphere in a room, making it ideal for cozy settings like living rooms or bedrooms. It can also serve practical purposes, such as reducing glare in outdoor lighting or setting the mood for events like Halloween or themed parties. Additionally, orange light is often used in photography and stage lighting to enhance visual effects.

How much voltage required for buib?

Actually the range of the voltage required for the bulb is depends on type of the bulb. Hence the range is mentioned on the pack of the light. It may be 30v, 60v,120v. In order to avoid voltage fluctuations place a adapter to the bulb. Vocca adapters are available in the market. They can reduce the voltage fluctuations. And also vocca adapters are voice activated adapters.

A neon light is more similar to an incandescent light or a fluorescent light explain how you know?

A neon light is much more similar to a fluorescent light.

I know because I have a Ph.D. in physical chemistry, but I suspect you mean "justify your answer," so here goes.

In a gas-discharge light (a neon light), a gas is ionized by an electric potential. Free electrons are then accelerated through the ionized gas. This causes the ions to transition into an excited electronic state. When the ion decays back to the ground state, energy of characteristic frequencies is emitted; the dominant frequencies depend on the gas, the voltage, and the pressure. This is why neon lights are orange-red: the dominant characteristic visible frequencies for neon gas are in the orange-red portion of the spectrum. (If you see a "neon" light that isn't orange-red, it's probably not really using neon gas.)

A fluorescent light is exactly the same, except that the inside of the tube is coated with a fluorescent material. It absorbs the (high frequency) energy emitted by the gas discharge itself, and emits energy at a lower frequency (characteristic of the specific material). The gas in fluorescent lights is usually low-pressure mercury vapor, whose dominant emisison frequencies are in the ultraviolet. This is absorbed by the phosphor in the tube and re-emitted as a lower frequency (in the visible spectrum). Most fluorescent lights have a mixture of phosphors so that the emitted light appears "white" because it's actually a mix of different colors that kind of "average out" to white (this is like how the red, green, and blue phosphors in a CRT "blend" to appear white).

To confuse matters even further, a lot of modern "neon" lights are actually just fluorescent lights with a colored dye or sleeve applied to the tube (if the tube, when off, appears white, colored, or "cloudy", it's probably a fluorescent light instead; if it's clear and looks empty, then it's pure gas-discharge). This allows for the production of "neon" lights of any color desired and also allows different sections of the tube to have different colors.

An incandescent light glows because it's hot ("black body" radiation or "cavity" radiation). There's no characteristic frequency, though there is an emissions maximum which varies depending on temperature. If it's relatively cool ("red hot" is relatively cool as used here), it will appear a dull red; as it gets hotter it turns bright red, then orange, then yellow, then white, and ultimately starts to appear to have a bluish tinge as the emissions maximum shifts to shorter and shorter wavelengths.

How many lumen output in a 50 watt power led?

Typically power leds operate as 1-2 watt units. 50 watt is a little excessive for a single led: it would have to be an array. The light output that can be achieved in normal use appears to range from 80-120 lumen/watt, so I guess the answer would be something like 4000-6000 lumen!

How do you connect a wire to make the bulb light?

To connect a wire to make a bulb light up, you need to complete an electric circuit. This involves connecting one end of the wire to the positive terminal of a power source (such as a battery) and the other end to the bulb's positive terminal. Then, connect the negative terminal of the battery to the negative terminal of the bulb to complete the circuit and allow electricity to flow, causing the bulb to light up.

Does the resistance of a filament light bulb change as the bulb gets brighter?

Yes, the resistance of a filament light bulb increases as the bulb gets brighter. This is due to the increase in temperature of the filament, which causes the resistance to go up.

What is an object that transmit light or allows light to pass through it?

An object that transmits light or allows light to pass through it is called a transparent object. Examples of transparent objects include glass, water, and plastic. These objects allow light to travel through them with minimal distortion or absorption.

What are the advantages of LED fog lights?

LED lights are cool lights. More light is produced per watt in an LED light, verses an incandescent light. Even more energy can be saved if the light is solar.

Where can one get Full Spectrum light bulbs?

There are many places where one can get full spectrum light bulbs. Some of these would include home improvement stores such as the Home Depot, or straight from a manufacturer such as Verilux.