Is Kirchoff's Theorem Misunderstood in Relation to Power Absorption?

Click For Summary
SUMMARY

This discussion centers on Kirchoff's Theorem, specifically its application to power absorption and emission. The equation presented, $$e=J(T,f)A$$, defines power emitted (e) in relation to power absorbed (A) and suggests that if E is the total power supplied, then $$e=E-A$$. The confusion arises regarding the interpretation of A, which is identified as the fraction of power absorbed by the object in question. This clarification is crucial for accurately applying Kirchoff's Theorem in practical scenarios.

PREREQUISITES
  • Understanding of Kirchoff's Theorem in thermodynamics
  • Familiarity with power emission and absorption concepts
  • Basic knowledge of thermal radiation principles
  • Proficiency in mathematical equations related to energy transfer
NEXT STEPS
  • Research the implications of Kirchoff's Theorem in thermal radiation
  • Explore the relationship between power emitted and absorbed in different materials
  • Study advanced applications of Kirchoff's Theorem in engineering
  • Learn about the role of temperature (T) and frequency (f) in power emission
USEFUL FOR

Physicists, engineers, and students studying thermodynamics or energy transfer principles will benefit from this discussion, particularly those interested in the nuances of Kirchoff's Theorem and its applications in real-world scenarios.

Titan97
Gold Member
Messages
450
Reaction score
18
According to Kirchoff

$$e=J(T,f)A$$

##e## is the power emitted and ##A## is the power absorbed

If ##E## is the power supplied, can I say that

$$e=E-A$$
 
Physics news on Phys.org
"A" is the power absorbed by what?
 
by the object. I think i misunderstood the theorem.
A is the fraction of the power absorbed.
 

Similar threads

  • · Replies 8 ·
Replies
8
Views
2K
  • · Replies 19 ·
Replies
19
Views
17K
Replies
3
Views
2K
  • · Replies 5 ·
Replies
5
Views
2K
  • · Replies 7 ·
Replies
7
Views
758
Replies
8
Views
2K
  • · Replies 1 ·
Replies
1
Views
2K
  • · Replies 2 ·
Replies
2
Views
2K
  • · Replies 1 ·
Replies
1
Views
1K
  • · Replies 21 ·
Replies
21
Views
2K