Emitted radiation and absorbed solar radiation

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SUMMARY

The discussion focuses on calculating the ratio of emitted radiation to absorbed solar radiation on Jupiter, which has a black body temperature of 125K. The Stefan–Boltzmann law is confirmed as the correct approach, emphasizing the use of irradiance rather than area. The temperature difference of 20K above the expected value from absorbed solar radiation is critical for this calculation. Participants suggest using the formula W = sigma * temp^4 to derive the necessary ratio.

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  • Understanding of the Stefan–Boltzmann law
  • Knowledge of black body radiation concepts
  • Familiarity with temperature scales, specifically Kelvin
  • Basic grasp of irradiance and its implications in astrophysics
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Richmondh2o
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Jupiter has a black body temperature of 125K, but this is 20 K higher than the temperature that would be calculated from absorbed solar radiation alone. From this information, calculate the ratio of emitted radiation to absorbed solar radiation on Jupiter.

I started using

W = sigma * area * temp^4

Is that of any help?
Or are they any hints that I might try to start with?
 
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Richmondh2o said:
Jupiter has a black body temperature of 125K, but this is 20 K higher than the temperature that would be calculated from absorbed solar radiation alone. From this information, calculate the ratio of emitted radiation to absorbed solar radiation on Jupiter.

I started using

W = sigma * area * temp^4

Is that of any help?
Or are they any hints that I might try to start with?

Stefan–Boltzmann law is correct.
No need to include area; just use the ratio of the two in terms of their irradiance, comparing the 4th power of the temperature of the two.
...
 

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