How to Calculate Emissive Power using the Stefan-Boltzmann Constant

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SUMMARY

The discussion focuses on calculating emissive power using the Stefan-Boltzmann constant, specifically the equation E = σT^4, where σ is the Stefan-Boltzmann constant (5.67 x 10^-8 W/m²K⁴) and T is the temperature in Kelvin. The user calculated an emissive power of 41151.9 W/m² for a temperature of 923 K. To determine the wavelength of emitted radiation, the user was advised to utilize Wien's Displacement Law, which relates temperature to peak wavelength.

PREREQUISITES
  • Understanding of the Stefan-Boltzmann constant and its application in thermal radiation.
  • Familiarity with the equation E = σT^4 for calculating emissive power.
  • Knowledge of Wien's Displacement Law for determining peak wavelength.
  • Basic concepts of thermal physics and blackbody radiation.
NEXT STEPS
  • Study Wien's Displacement Law to understand its application in thermal radiation.
  • Learn about Planck's Law for calculating spectral radiance of blackbody radiation.
  • Explore the implications of emissive power in real-world applications, such as thermal imaging.
  • Investigate the relationship between temperature and emissive properties in different materials.
USEFUL FOR

Students and professionals in physics, engineers working with thermal systems, and anyone interested in the principles of thermal radiation and emissive power calculations.

tweety_2479
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Emissive power question help needed!

The question is on emissive power emitted and i have attached it as a file

RELEVANT EQUATIONS

E=stefan Boltzmann constant * T^4

ATTEMPT

E=(5.67*10-8) * (923)^4
E = 41151.9

Don't know how to get the wavelength from this
should i use Plancks equation for emissive wavelength

To help the answers are included, its a multiple choice paper

thanks for your help
 
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Look up Wien's Displacement Law.
 
yeh that's it thanks! didnt think of that equation because i haven't used it since a level physics !
 

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