What Should the Detector Temperature Be for Measuring Black Body Radiation?

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Homework Help Overview

The problem involves measuring black body radiation within a cavity at temperature T and determining the appropriate temperature for the detector (T’). The discussion centers around the implications of the detector's temperature relative to the cavity's temperature.

Discussion Character

  • Conceptual clarification, Assumption checking

Approaches and Questions Raised

  • Participants explore the relationship between the detector's temperature and the cavity's temperature, questioning whether T’ should be greater than, equal to, or less than T. Some participants express uncertainty about the effects of the detector's temperature on the measurement.

Discussion Status

The discussion is ongoing, with some participants providing reasoning for their views on the detector's temperature. There is no explicit consensus yet, as various interpretations are being considered.

Contextual Notes

Participants are considering the implications of different temperature scenarios for the detector, including potential effects on the measurement outcomes. The original poster has provided multiple options for T’ to guide the discussion.

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Homework Statement


Suppose you are inside a black body radiation cavity which is at temperature T. Your job is to measure the radiation field in the frequency interval from 1014 to 89 x1014 Hz. You have a detector to do the job. What should the temperature of the detector (T’) be?
Explain your answer.
Possible options are T’>T, T’=T, T’<T, T=0K, or is the temperature of the detector is irrelevant to the measurement?



Homework Equations





The Attempt at a Solution

 
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you post very interesting questions, however I am also no help at this question either.
 


thank you
 


Anybody have an answer for this? I have been wracking my brains all night but cannot come up with a solution :(
 


shouldn't T'=T because if the temp of the detector was higher than in than in the cavity, it would radiate and effect the result, and same if it was colder, it would absorb radiation from the cavity to come up to equilibrium...
 
Last edited:

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