An incandescent light bulb produces a continuous
spectrum because the source of the light is a metal filament (wire). A continuous spectrum emanates from the dark parts of the universe. The peak of this radiation corresponds to a temperature of about 2.7 degrees Kelvin.
Full
Answer
Are incandescent bulbs the only light source that produces a continuous spectrum?
An incandescent light bulb produces what kind of visible spectrum? A. Blackbody. B. Discrete. C. Continuous. D. Infrared. Find sample essays on related topics: Physics 1 Answer.
What is the source of the light spectrum?
Nov 04, 2015 · Selected Answer: a continuous spectrum with some bright lines superimposed. Instructions Question 1 1 out of 1 points A red object appears "red" to the eye when illuminated with white light. Light from other colors is not seen by the eye because those colors are Selected Answer: absorbed Correct Answer: absorbed.
What is the color spectrum of incandescent light bulbs?
Jan 14, 2016 · An incandescent bulb emits a greater proportion of red light than natural daylight. Emission even extends into the infrared part of the electromagnetic spectrum, which wastes energy and reduces the overall efficiency of the bulb.
What is an example of a continuous light spectrum?
What is the temperature of an incandescent bulb?
An incandescent light bulb contains a tungsten filament that is resistively heated when a current is conducted through it. At temperatures around 2000 K , the filament starts to emit visible light. To prevent the tungsten wire from burning up, the bulb is filled with a gas, usually argon.
How is visible light produced?
Visible light is produced by two mechanisms: optical emission directly from the discharge, or by exciting phosphors on the surface of the tube.
What is the purpose of blue LEDs?
However, it was the invention of the blue LED that led to the creation of new, efficient white light sources. Blue light emitted from such LEDs can be used to stimulate a wider spectrum of emission from a phosphor layer around the LED casing, or can be directly combined with red and green LEDs to create white light.
Why are fluorescent bulbs inefficient?
Like incandescent bulbs, fluorescent bulbs can be inefficient because the plasma needs to be sustained and it emits radiation in the nonvisible range.
How does Philips Hue work?
The Philips Hue system works by varying the amount of blue, green, and red light that is output, which you can set directly from your smartphone. If you are sensitive to a specific color of light, you can simply avoid it. You can set the lighting depending on your mood to help concentrate, energize, read, or relax.
Can LED bulbs replicate natural daylight?
As you will see, the emission spectra are very different, and none of them can perfectly replicate natural daylight.
Mechanism
Incandescent light bulbs work when electricity is applied to the bulb. The electricity heats a filament in the bulb, causing the filament to emit light. The filament then projects its light outward through the glass shell in which it's enclosed. If the filament breaks, as anyone who has ever dro…
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Advantages
Fluorescent light has a very different light quality from incandescent light. To many people, fluorescent light seems \"colder.\" Fluorescent light bulbs also take longer to become fully illuminated than incandescent bulbs do. However, once they're illuminated, fluorescent bulbs last much longer than incandescent bulbs. Additionally, it takes far less power to illuminate a fluores…
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Toxicity
However, there were negatives to take into account as well. There have been many concerns raised over the years about the degree of mercury present in fluorescent lightbulbs. Mercury is highly toxic to humans and animals, and although we don't know what mercury is like in terms of light exposure, those concerns have remained significant.
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Purpose
Operation
An incandescent bulb is on what's called a continuous spectrum. This means that all visible colors are present. In contrast to a fluorescent light spectrum, which only produces a limited amount of color, the incandescent light spectrum is more dynamic. The fluorescent light spectrum is called an \"emission\" spectrum because the source of the light is the output of electrified gas. In this s…
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Properties
As discussed above, an incandescent light bulb produces a continuous spectrum. However, incandescent bulbs aren't the only light source that produces a continuous spectrum. A very well-known source of a continuous spectrum is the sun. The solar spectrum is both continuous and incandescent. In that way, an incandescent lightbulb is the bulb closest to the experience of nat…
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Examples
A candle is another example of an incandescent source that produces a continuous spectrum. If you light a candle and place it across the room, you'll be able to see the continuous spectrum of colors in the flame. The same is true of stars in the sky. While very few stars are bright enough for the colors of the continuous spectrum to be seen by the human eye, the incandescent spectrum …
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Types
Varieties
When discussing the varieties of light related to the environment, it can be difficult to know exactly which bulb is the best overall. Particularly in terms of fluorescent vs. incandescent bulbs, there are pros and cons on each side. Depending on your needs and budget, you may find that a combination of both bulbs is the best idea.
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Benefits
Fluorescent lights require significantly less energy than incandescent lights. This is a boon for the environment, especially at a time where most cities are attempting to reduce their energy consumption. Fluorescent light bulbs, while more expensive, also last longer than an incandescent bulb. This means that although fluorescent lights are more expensive to purchase …
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Effects
However, although fluorescent bulbs produce light with less energy, it does take the lights longer to turn on and achieve maximum brightness than it takes an incandescent bulb. Incandescent bulbs turn on and illuminate their filaments almost instantly. Fluorescent lights can take up to a full minute to achieve their full brightness. This may be critical if your needs are to illuminate a s…
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Issues
There is also the matter of quality of light. Fluorescent lights produce a quality of light that limits the colors projected. This can create an unpleasant atmosphere in a space. On the other hand, incandescent light gives a continuous spectrum of light, most closely mimicking daylight or sunlight or the illumination of thousands of candles.
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