Incandescent light bulbs
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Incandescent light bulbs
Incandescent light bulbs are a type of electric light that produce light through the heating of a wire filament. They were invented in the late 19th century and became the primary form of electric lighting for homes and businesses until the development of more energy-efficient technologies.
The filament in an incandescent bulb is made of a thin wire, typically tungsten, which is coiled into a small spiral or “filament.” When an electric current is passed through the filament, it heats up to a very high temperature, emitting light in the visible spectrum. The bulb is filled with an inert gas, such as argon, which helps prevent the filament from oxidizing and burning out too quickly.
One of the main advantages of incandescent bulbs is their simplicity and low cost. They are easy to manufacture and can be produced in a wide range of shapes and sizes. They also provide a warm, familiar glow that many people find comforting and aesthetically pleasing.
However, incandescent bulbs are highly inefficient compared to other types of lighting. They convert only about 5% of the energy they consume into visible light, with the remaining 95% being lost as heat. This means that they are not only more expensive to operate, but also generate a significant amount of wasted heat, which can be a concern in warmer climates.
In addition to their inefficiency, incandescent bulbs also have a relatively short lifespan, typically lasting between 750 and 1,000 hours. This means that they need to be replaced frequently, which can add up in terms of both cost and environmental impact.
As a result of these drawbacks, many countries around the world have phased out or banned the sale of incandescent bulbs in favor of more energy-efficient alternatives such as compact fluorescent lamps (CFLs) and light-emitting diodes (LEDs). These technologies are much more efficient than incandescent bulbs, using anywhere from 75% to 90% less energy to produce the same amount of light.
Despite these drawbacks, incandescent bulbs remain in use in certain applications where their warm, familiar glow is valued over their inefficiency. They are also used in certain specialized applications, such as in stage lighting and in some types of scientific instruments.
In conclusion, incandescent light bulbs were once the dominant form of electric lighting but have become increasingly less common as more energy-efficient alternatives have been developed. While they are simple and inexpensive, they are highly inefficient and have a relatively short lifespan, making them costly to operate and maintain. However, they remain in use in certain applications where their warm, familiar glow is valued over their inefficiency.
Incandescent light bulbs
RUBRIC
Excellent Quality
95-100%
Introduction 45-41 points
The background and significance of the problem and a clear statement of the research purpose is provided. The search history is mentioned.
Literature Support
91-84 points
The background and significance of the problem and a clear statement of the research purpose is provided. The search history is mentioned.
Methodology
58-53 points
Content is well-organized with headings for each slide and bulleted lists to group related material as needed. Use of font, color, graphics, effects, etc. to enhance readability and presentation content is excellent. Length requirements of 10 slides/pages or less is met.
Average Score
50-85%
40-38 points
More depth/detail for the background and significance is needed, or the research detail is not clear. No search history information is provided.
83-76 points
Review of relevant theoretical literature is evident, but there is little integration of studies into concepts related to problem. Review is partially focused and organized. Supporting and opposing research are included. Summary of information presented is included. Conclusion may not contain a biblical integration.
52-49 points
Content is somewhat organized, but no structure is apparent. The use of font, color, graphics, effects, etc. is occasionally detracting to the presentation content. Length requirements may not be met.
Poor Quality
0-45%
37-1 points
The background and/or significance are missing. No search history information is provided.
75-1 points
Review of relevant theoretical literature is evident, but there is no integration of studies into concepts related to problem. Review is partially focused and organized. Supporting and opposing research are not included in the summary of information presented. Conclusion does not contain a biblical integration.
48-1 points
There is no clear or logical organizational structure. No logical sequence is apparent. The use of font, color, graphics, effects etc. is often detracting to the presentation content. Length requirements may not be met
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