Temperature Hotter at Top of Bulb - Why?

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SUMMARY

The discussion centers on the phenomenon of temperature variation on a light bulb, specifically why the top of the bulb is hotter than the sides. Integral emphasizes the need for detailed information about the apparatus, methods, and goals to provide meaningful assistance. A participant mentions that tungsten filament evaporation contributes to temperature differences, as evaporated tungsten deposits on the glass envelope, affecting light absorption and filament lifespan. The inquiry also includes a request for insights on the relationship between power and temperature in a light bulb.

PREREQUISITES
  • Understanding of tungsten filament properties and behavior
  • Basic principles of thermodynamics related to heat transfer
  • Familiarity with light bulb construction and operation
  • Graphing techniques for analyzing power vs. temperature relationships
NEXT STEPS
  • Research the effects of filament evaporation on light bulb efficiency
  • Learn about heat transfer mechanisms in electrical components
  • Investigate the relationship between electrical power and thermal output in light bulbs
  • Explore graphing techniques for visualizing power vs. temperature data
USEFUL FOR

Students and researchers in physics, electrical engineers, and anyone studying the thermal dynamics of incandescent lighting systems.

sheikhfahad
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CAn you tell me why will the temperature of the surface will be hotter at the top on the blub rathen than on the side?
thank you
 
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No, we cannot tell you why the top might be hotter then the sides. Why? Simply because you have not provided enough information to even guess. If you want meaningful help with this project you will need to post a detailed discription of your appratus, your methods and your goals.


Further, I would appreciate it if you would use a single thread rather then starting a new one for each question.

Thanks,
Integral
 
alright i am sorry

Integral said:
No, we cannot tell you why the top might be hotter then the sides. Why? Simply because you have not provided enough information to even guess. If you want meaningful help with this project you will need to post a detailed discription of your appratus, your methods and your goals.


Further, I would appreciate it if you would use a single thread rather then starting a new one for each question.

Thanks,
Integral

Is it because "The tungsten filament evaporates more rapidly as the temperature of the filament goes up. The evaporated tungsten particles tend to deposit on the glass envelope, causing over time, an increase in light absorption. Eventually, the filament material will evaporate enough to cause the filament to break, completely ending the life of the lamp."

i am doing an investigation to find the relationship between power and temperature?

need to find the surface temperature, also can u tell me how the graph would look like for the power and temperature. will it be as power increase the temperature decrease?

thanks and i am sorry for the 2 post
 

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